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Seminar "Numerical Mathematics"

This is the seminar webpage for the joint research seminar of RG3 and LG5.

Place: Weierstrass-Institute for Applied Analysis and Stochastics
Mohrenstraße 39, 10117 Berlin
Organizers: Volker John, Jürgen Fuhrmann, Patricio Farrell, Alfonso Caiazzo, Christian Merdon

Upcoming and recent talks


Title: Coupling of conforming and mixed finite element methods for a model of wave propagation in thermo-poroelasticity in the frequency domain.
Speaker: Hongpeng Li (WIAS Berlin)
Time: Tuesday, 21.10.2025, 13:30
Location: WIAS-406

The thermo-poroelasticity model characterizes the coupling between mechanical deformation, fluid flow, and heat transfer in porous media. As an extension of Biot's classical poroelasticity theory, which models fluid-solid interaction under the isothermal condition, it incorporates the impact of temperature changes on solid displacement, as well as the compressibility and thermal expansion of both solid and fluid phases.

We investigate a full-dynamic, linear thermo-poroelasticity model, containing inertial and relaxation terms with second-order time derivatives. The mathematical and numerical analysis of this model is performed in the frequency rather than time domain. We analyze the variational formulation within the framework of Fredholm's alternative and T-coercivity. The well-posedness is rigorously proved under reasonable parameter assumptions. We propose a stabilized coupling of conforming and mixed finite element methods, which are free of volume locking, pressure and temperature oscillations. By incorporating projections in certain sesquilinear forms, the well-posedness of the finite element solutions can be obtained through the same reasoning as in the continuous case. The optimal error estimates are derived for all variables. Numerical experiments validate the accuracy and robustness of our formulation.

Title: An efficient stabilized Navier-Stokes solver to simulate turbulent flows in process-intensified devices.
Speaker: Laura Prieto Saavedra (WIAS Berlin)
Time: Thursday, 16.10.2025, 14:00
Location: WIAS-406

Process intensification aims to design innovative equipment that enhances mass and heat transfer without negatively affecting the environment and process costs. Process-intensified devices, such as, static mixers and spinning disc reactors, have common characteristics that can be summarized as follows: complex (curved) geometries, concurrent physical phenomena (turbulence, energy and mass transfer, chemical reactions) and (rotating) transient incompressible flows at an intermediate Reynolds number ($Re \in [10^3, 10^5]$). The hydrodynamics within these devices are complex, and experimental methods are no longer sufficient to fully characterize the flow behavior. The numerical modeling of the flow, also known as Computational Fluid Dynamics (CFD), helps overcome these limitations. However, the simulation of turbulent flows remains a challenge even with modern high-performance computing architectures. In this talk, we present a stabilized solver for the incompressible Navier-Stokes equations implemented in a matrix-free fashion with a sum-factorization approach. We solve the fully-coupled discretized problem in a monolithic way using a geometric multigrid preconditioner for the solution of the linear system. The solver is implemented in Lethe, an open-source CFD software, which uses the deal.II finite element library and a continuous Galerkin discretization. We validate and verify the solver using a variety of steady-state and transient benchmarks for turbulent flow. The results show better scalability and lower memory requirements than the results obtained using a matrix-based approach, rendering efficient high-order parallel simulations for complex practical problems.

Past talks

  • 22.07.2025, Abdul Wahab (University of Management and Technology, Lahore, Pakistan), Modeling and simulation of blood flow in unhealthy elliptic arteries with computational fluid dynamics approach.
  • 17.07.2025, Patrick Jaap (WIAS Berlin), Stochastic Rounding: When 0.1 + 0.2 - 0.3 does equal zero (at least on average).
  • 15.07.2025, Prof. Dr. André Massing (NTNU Trondheim), Cut finite element methods for complex multi-physics problems.
  • 24.06.2025, Moaad Khamlich (SISSA Trieste), Efficient numerical strategies for regularized semi-discrete optimal transport.
  • 17.06.2025, Raimund Bürger (Universidad de Concepción, Chile), Numerical solution of multispecies kinematic flow models through invariant-region-preserving WENO schemes.
  • 05.06.2025, Adrian Hill (Technische Universität Berlin), Composable sparse automatic differentiation in Julia.
  • 22.05.2025, Holger Stephan (WIAS Berlin), Improvement of the diffusion equation using hyperbolic systems and memory equations.
  • 15.05.2025, Peter Munch (Technische Universität Berlin), The deal.II finite-element library: recent developments and applications.
  • 17.04.2025, Marwa Zainelabdeen (WIAS Berlin), Gradient-robust finite element-finite volume scheme for the compressible Stokes equations.
  • 27.03.2025, Kees Vuik (Delft University of Technology), Resolving divergence: the first multigrid scheme for the highly indefinite Helmholtz equation using classical components.
  • 13.03.2025, John Papadopoulos (WIAS Berlin), Hierarchical proximal Galerkin: a fast hp-FEM solver for variational problems with pointwise inequality constraints.
  • 27.02.2025, El-Houssaine Quenjel (La Rochelle Université), Stable finite volume methods for transient convection-diffusion systems with anisotropy.
  • 14.01.2025, Christopher Rackauckas (Massachusetts Institute of Technology, Julia Lab), The numerical analysis of scientific machine learning and differentiable programming.
  • 14.01.2025, Jinchao Xu (King Abdullah University of Science and Technology), Finite neuron methods for partial differential equations.
  • 28.11.2024, Lucas. O. Muller (University of Trento), Towards real-life computional haemodynamics.
  • 24.10.2024, Winnifried Wollner (Universität Hamburg), Gradient-robustness in the context of optimal control.
  • 01.10.2024, Philip L. Lederer (Universität Hamburg), High-order projection-based upwind method for implicit large eddy simulation.
  • 18.09.2024, Albert Pool (DLR e.V.), Nonlinear dynamics as a ground-state solution on quantum computers.
  • 16.07.2024, Nishant Ranwan (IISER Thiruvananthapuram), Existence of a Weak Solution to the Fluid-Structure Interaction Problem of Blood Flow in Coronary Artery.
  • 06.06.2024, Tim Siebert (WIAS/TU Berlin), Algorithmic differentiation with a focus on higher-order derivatives.
  • 06.06.2024, Steffen Maass (WIAS/TU Berlin), Symbolic-numeric modeling of electrochemical interfaces.
  • 04.06.2024, Daniel Runge (WIAS), Mass-conservative reduced basis approach for heterogeneous catalysis.
  • 04.06.2024, Jürgen Fuhrmann (WIAS), The nonlinear finite Volume solver VoronoiFVM.jl: capabilities, applications and plans.
  • 28.05.2024, Francesco Romor (WIAS), Registration-based data assimilation of aortic blood flows.
  • 28.05.2024, Sarah Katz (WIAS), Pulsatile flow in the aorta: modelling and simulation.
  • 23.05.2024, Alfonso Caiazzo (WIAS), Multiscale modeling of elastic materials & Overview of applications in the assimilation of biomedical data.
  • 21.05.2024, Christian Merdon (WIAS), Pressure-robustness in Navier--Stokes simulations.
  • 16.05.2024, Medine Demir (WIAS), Pressure-robust approximation of the incompressible Navier--Stokes equations in a rotating frame of reference.
  • 14.05.2024, Marwa Zainelabdeen (WIAS), Physics-informed neural networks for convection-dominated convection-diffusion problems.
  • 14.05.2024, Cristian Cárcamo (WIAS), Equal-order finite element methods for coupled and multiphysics problems.
  • 07.05.2024, Dilara Abdel (WIAS), Modeling and simulation of vacancy-assisted charge transport in innovative semiconductor devices.
  • 07.05.2024, Timo Streckenbach (WIAS), Alternative approach to model lattice mismatch of semiconductor nanostructures.
  • 02.05.2024, Baptiste Moreau (WIAS), .
  • 02.05.2024, Ondřej Pártl (WIAS), Optimization of geothermal energy production from fracture-controlled reservoirs via 3D numerical modeling and simulation.
  • 30.04.2024, Patricio Farrell (WIAS), Numerical methods for innovative semiconductor devices.
  • 25.04.2024, Holger Stephan & trainees (WIAS), Modelling of drift diffusion problems from different perspectives.
  • 23.04.2024, Yiannis Hadjimichael (WIAS), An energy-based finite-strain model for 3D heterostructured materials.
  • 23.04.2024, Zeina Amer (WIAS), Numerical methods for coupled drift-diffusion and Helmholtz models for laser applications.
  • 18.04.2024, Volker John (WIAS/FU Berlin), Finite element methods respecting the discrete maximum principle for convection-diffusion equations.
  • 14.12.2023, Christos P. Papanikas (WIAS/University of Cyprus/Erasmus+), From medical data to 3D modeling: simulation of cancer growth in mouse liver.
  • 12.12.2023, Jan Philipp Thiele (WIAS), Error-controlled space-time finite elements, algorithms and implementations for nonstationary problems.
  • 23.11.2023, Grégoire Pourtier (TU Berlin / WIAS), A Julia-based universal solver for system of one-dimensional nonlinear PDEs.
  • 16.11.2023, Francesco Romor (WIAS), Efficiently solving parametric PDEs on solution manifolds parametrized by neural networks.
  • 12.10.2023, Hang Si (Cadence Design Systems), Perspectives of anisotropic Delaunay mesh adaptation.
  • 26.07.2023, Stefan Ringe (Korea University), First-principles multi-scale modeling of electrochemical CO2 reduction.
  • 20.07.2023, David Brust (DLR), Modelling Study of a Photo-Thermal Catalytic Reactor for rWGS Reaction Under Concentrated Irradiation.
  • 18.07.2023, Roman Schärer (ZHAW), A Non-isothermal Cell Performance Model for Organic Flow Batteries.
  • 18.07.2023, Benoît Gaudeul (Paris-Saclay), Title tba.
  • 11.07.2023, Derk Frerichs-Mihov (WIAS), Using deep learning techniques to improve the discrete solution of convection-dominated convection-diffusion equations.
  • 04.07.2023, Marwa Zainelabdeen (WIAS Berlin), An optimally Convergent Convection-Stabilized Taylor-Hood Finite Element Method for the Oseen Equations.
  • 29.06.2023, Sarah Katz (WIAS Berlin), Impact of Turbulence Modeling on Simulations of Aortic Blood Flow.
  • 22.06.2023, Cristian Cárcamo Sánchez (WIAS Berlin), A stabilized finite element method for the Stokes-Temperature coupled problem.
  • 15.06.2023, Medine Demir (WIAS Berlin), Vorticity based stabilization method for Fluid-Fluid interaction problem.
  • 16.05.2023, Camilla Belponer (WIAS Berlin & Uni Augsburg), Reduced Lagrange multiplier approach for the non-matching coupled problems in multiscale elasticity.
  • 11.05.2023, Théo Belin (Centrale Supélec), An entropic finite volumes scheme for a fully non-linear forward-backward parabolic equation.
  • 23.03.2023, Gabriel Barrenechea (University of Strathclyde), Positivity-preserving discretisations in general meshes.
  • 19.01.2023, Michele Pütz (BTU Cottbus-Senftenberg), Quadrature-Based Moment Methods for the Solution of Population Balance Equations.
  • 13.12.2022, Xu Li (Shandong University), Inf-sup stabilized Scott--Vogelius elements for incompressible flows.
  • 08.09.2022, Dr. Yiannis Hadjimichael (WIAS Berlin), Implicit strong-stability-preserving Runge--Kutta methods with downwind-biased operators.
  • 21.07.2022, Prof. Gabriel Acosta (University of Buenos Aires, Argentinien), Nonlocal models related problems.
  • 12.07.2022, Dr. Zahra Lakdawala (Lahore University of Management Sciences, Pakistan), On water wave dynamics using physics informed neural networks.
  • 20.06.2022, Prof. Maxim A. Olshanskii (University of Houston, USA), Numerical analysis of surface fluids.
  • 07.06.2022, Dr. Gabriel R. Barrenechea (University of Strathclyde, GB), Divergence-free finite element methods for an inviscid fluid model.
  • 02.06.2022, Julien Moatti (Université de Lille, Frankreich), A structure preserving hybrid finite volume scheme for semi-conductor models on general meshes.
  • 31.03.2022, Dr. Stefano Piani (International School for advance studies, Italien), HDG methods for the Van Roosbroeck model.
  • 24.03.2022, Dr. Nicola Courtier (University of Oxford, UK), Part I: Accurate and adaptable charge transport modelling of perovskite solar cells using IonMonger Part II: Parameter/state estimation using the measure-moment approach to polynomial optimisation.
  • 10.03.2022, Xu Li (Shandong University, China), Two divergence-free reconstructions for Navier--Stokes simulations regarding EMA and robust estimates of kinetic energy error.
  • 18.11.2021, Dr. Felipe Galarce Marin (WIAS Berlin), Physics-based assimilation of displacements data from magnetic resonance elastography.
  • 15.07.2021, Prof. Marc-Andre Keip (Universität Stuttgart), Multiscale analysis of instability-induced pattern transformations of compositeactive solids.
  • 24.06.2021, Felipe Galarce Marin (WIAS Berlin), Inverse problems in haemodynamics. Fast estimation of blood flows on non-parametric domains from medical data.
  • 20.05.2021, Prof. Thomas Richter (Universität Magdeburg), Deep neural networks for accelerating fluid-dynamics simulations.
  • 15.04.2021, Prof. Julia Novo (Universidad Autonoma de Madrid, Spanien), Error analysis of proper orthogonal decomposition stabilized methods for incompressible flows.
  • 25.03.2021, Benoit Gaudeul (Université Lille, France), Two entropic finite volume schemes for a Nernst--Planck--Poisson system with ion volume constraints.
  • 18.03.2021, Prof. Leo Rebholz (Clemson University, USA), Anderson acceleration and how it speeds up convergence in fixed point iterations.
  • 16.03.2021, Dr. Jürgen Fuhrmann (WIAS Berlin), PDELib.jl: Towards software components for the numerical solution of partial differential equations in Julia.
  • 25.02.2021, Vojtěch Miloš and Petr Vágner (University of Chemistry and Technology Technická, Prag and WIAS Berlin), Modelling of YSZ|LSM|O_2 electrode with experimental validation.
  • 18.02.2021, Derk Frerichs (WIAS Berlin), On reducing spurious oscillations in discontinuous Galerkin methods forconvection-diffusion equations.
  • 11.02.2021, Dr. Ulrich Wilbrandt (WIAS Berlin), Optimization of stabilization parameters for convection-dominated convection-diffusion equations.
  • 02.02.2021, Volker Kempf (Bundeswehr-Universität München), Anisotropic and pressure-robust finite element discretizations for the Stokes equations.
  • 21.01.2021, Felipe Galarce (INRIA, Paris), Inverse problems in haemodynamics -- fast estimation of blood flows from medical data.
  • 17.11.2020, Prof. Peter Berg (University of Alberta, Kanada), From microscale to macroscale properties of polymer electrolyte membranes: A case for pore network models.
  • 08.10.2020, Dr. Yiannis Hadjimichael (WIAS Berlin), Numeral approximations for spatial-dependent SIR models.
  • 03.09.2020, Prof. Andrea Walther (HU Berlin), Algorithmic differentiation: Sensitivties, adjoints and nonsmooth optimization.
  • 23.07.2020, Dr. Zahra Lakdawala (WIAS Berlin), Supervised and unsupervised learning frameworks for fluid mechanics.
  • 25.06.2020, Holger Stephan (WIAS Berlin), An overview of Lyapunov functions for linear continuous and discrete problems including some new results.
  • 04.06.2020, Prof. Volker John (WIAS Berlin), On the provable convergence order for the kinetic energy of FEMs for the incompressible Navier--Stokes equations.
  • 28.05.2020, Dr. Hang Si (WIAS Berlin), Detri2, a 2D constrained Delaunay-Voronoi mesh generator.
  • 14.05.2020, Derk Frerichs (WIAS Berlin), Basic concepts of virtual element methods and a really pressure-robust virtual element method for the Stokes problem.
  • 07.05.2020, Dilara Abdel (WIAS Berlin), Comparison of modified Scharfetter-Gummel schemes for generalized drift-diffusion systems.
  • 05.05.2020, Dr. Christian Merdon (WIAS Berlin), A novel gradient-robust, well-balanced discretisation for the compressible Stokes problem.
  • 05.03.2020, Dr. Alexander Linke (WIAS Berlin), Gradient-robustness: A new concept assuring accurate spatial discretizations for vector-valued PDEs.
  • 27.02.2020, Dr. Philip Lederer (TU Wien, Österreich), Divergence-free tangential finite element methods for incompressible flows on surfaces.
  • 27.02.2020, Dr. Anton Stephan (Institut für Physik der Atmosphäre), Modeling Navier--Stokes equations for high Reynolds number flows and complex geometries in aerodynamic applications.
  • 20.02.2020, Prof. Wolfgang Dreyer (WIAS Berlin), Classical tests of electro-chemistry.
  • 18.02.2020, Ondřej Pártl (WIAS Berlin), Mathematical modeling of non-isothermal compositional compressible fluid flow in zeolite bed and above its surface.
  • 13.02.2020, Dr. Gabriel R. Barrenechea (University of Strathclyde, Scotland), Low-order divergence-free finite element methods.
  • 06.02.2020, Dr. Holger Stephan (WIAS Berlin), A general concept of majorization and a corresponding Robin Hood method.
  • 09.01.2020, Lia Strenge (Technische Universität Berlin), A multilayer, multi-timescale model approach for economic and frequency control in power grids using Julia.
  • 12.12.2019, Dr. Nancy Hitschfeld Kahler (Universdad de Chile, Santiago), GPU computing and meshing.
  • 07.11.2019, Benoit Gaudeul (Universite de Lille , Frankreich), Some numerical schemes for a reduced case of a Nernst--Planck--Poisson model.
  • 04.11.2019, Dr. Christopher Rackauckas (Massachusetts Institute of Technology/University of Maryland, USA), Neural differential equations as a basis for scientific machine learning.
  • 03.09.2019, Dr. Yori Fournier (Leibniz-Institut für Astrophysik Potsdam (AIP)), Non-local effects in the solar dynamo.
  • 11.07.2019, Arijit Hazra (Tata Institute of Fundamental Research, Indien), Globally constraint-preserving FR/DG scheme for Maxwell's equations up to fifth order of accuracy.
  • 02.07.2019, Dr. Ankik Kumar Giri (Indian Institute of Technology Roorkee), Recent developments in the theory of coagulation-fragmentation models.
  • 17.05.2019, Prof. Peter Berg (University of Alberta, Kanada), Energy conversion in electrokinetic flow through charged and viscoelastic nanochannels.
  • 16.05.2019, Prof. Robert Eisenberg (Rush University Chicago, USA), Voltage sensors of biological channels are nanomachines that perfectly conserve current, as Maxwell defined it.
  • 09.05.2019, Dr. Christoph Freysoldt (Max-Planck-Institut für Eisenforschung GmbH), Concepts and algorithms in SPHInX.
  • 16.04.2019, Dr. Li Jie (University of Cambridge, GB), Macroscopic model for head-on binary droplet collisions in a gaseous medium.
  • 14.02.2019, Philipp Schroeder (Georg-August-Universität Göttingen), Building bridges: Pressure-robust FEM, Beltrami flows and structure preservation in incompressible CFD.
  • 23.01.2019, Prof. Vladimir A. Garanzha (Russian Academy of Sciences), Moving adaptive meshes based on the hyperelastic stress deformation.
  • 10.01.2019, Dr. Naveed Ahmed (Lahore University of Management Sciences, Pakistan), Numerical comparisons of finite element stabilized methods for a 2D vortex dynamics simulation at high Reynolds number.
  • 11.12.2018, Dr. W. Dreyer (WIAS Berlin), Kinetic theory of incompressible non-newtonian fluids.
  • 29.11.2018, Prof. J.H.M. ten Thije Boonkkamp (Eindhoven University of Technology, Niederlande), Flux vector approximation schemes for systems of conservation laws.
  • 15.11.2018, Prof. J. Shewchuk (University of California at Berkeley, USA), Higher-quality tetrahedral mesh generation for domains with small angles by constrained Delaunay refinement.
  • 13.09.2018, V. Milos (Charles University Prague), Thermodynamics and electrochemical impedance spectroscopy - 1D model of YSZ electrolyte and triple phase boundary interface.
  • 13.09.2018, Dr. Mine Akbas (Duzce University, Türkei), The analogue of grad-div stabilization in DG methods for incompressible flows: Limiting behavior and extension to tensor-product meshes.
  • 11.07.2018, Dr. E. Meneses Rioseco (Leibniz-Institut für Angewandte Geophysik, Hannover), Modeling, simulation and optimization of geothermal reservoir -- THMC (thermo-hydraulical, mechanical, chemical) processes involved.
  • 26.06.2018, Prof. T. Iliescu (Virginia Tech, USA), Physically-constrained data-driven correction for reduced order modeling of fluid flows.
  • 14.06.2018, Dr. Myfanwy Evans (TU Berlin), Surfaces and tangling.
  • 14.06.2018, Prof. L. Shen (University of the Chinese Academy of Sciences, Beijing), Implicitizing rational tensor product surfaces using the resultant of three moving planes.
  • 29.05.2018, G. Panasenko (University of Lyon, Frankreich & University of Chile), Asymptotic analysis of wave propagation in a laminated beam with contrasting stiffness of the layers.
  • 03.05.2018, Dr. H. Stephan (WIAS Berlin), One million perrin pseudo primes including a few giants.
  • 03.05.2018, L. Feierabend (Universität Duisburg-Essen), Model development for flowing slurry electrodes in zinc-air batteries.
  • 18.04.2018, Prof. P. Deuring (Universitè du Littoral ''Côte d'Opale'', Frankreich), Stabilitäts- und Fehlerschranken einer FE-FV-Diskretisierung von Konvektions-Diffusionsgleichung: exponentielle Abhängigkeit von Parametern.
  • 12.04.2018, Prof. M. J. Neilan (University of Pittsburgh, USA), Inf-sup stable Stokes pairs on barycentric refinements producing divergence-free approximations.
  • 01.03.2018, Dr. F. Dassi (Politecnico di Milano, Italien), Recent advancements of the Virtual Element Method in 3D.
  • 01.02.2018, L. Blank (WIAS Berlin), Towards a simple and robust finite element method for the numerical simulation of porous media flow.
  • 01.02.2018, Dr. E. Sinibaldi (Italian Institute of Technology), Selected modeling approaches for biomedical applications and biorobotics tools.
  • 18.01.2018, Prof. W. Dreyer (WIAS Berlin), Modeling of non-Newtonian fluids without material frame indifference.
  • 11.01.2018, Prof. G. Lube (Georg-August-Universität Göttingen), Why exactly divergence-free H(div)-conforming FEM for transient incompressible flows?.
  • 11.01.2018, Dr. A. Rasheed (Lahore University of Management Sciences, Pakistan), Influence of magnetic field on dendrites during solidification of binary mixtures.
  • 30.11.2017, M. Pavelka (Charles University, Tschechische Republik), 42=GENERIC --- Unified Hamiltonian description of solids and fluids.
  • 07.11.2017, J. Novo (Universidad Autonoma de Madrid, Spanien), Quasi-optimal methods to approximate the incompressible Navier--Stokes squations.
  • 19.10.2017, L. Rebholz (Clemson University, USA), On conservation laws of Navier--Stokes Galerkin discretizations.
  • 26.09.2017, Y. Ren (Dalian University of Technology, China), On tetrahedralisations containing knotted and linked line segments.
  • 19.09.2017, M. Patriarca (University of Rome ``Tor Vergata'', Italy), Discontinuous finite element discretization for semiclassical particle transport.
  • 14.09.2017, Prof. V. Garanzha (Russian Academy of Sciences, Moskau), Construction of quasi-isometric elastic deformations in mesh generation problems.
  • 14.09.2017, Prof. Na Lei (Dalian University of Technology, China), Quadrilateral and hexahedral mesh generation based on surface foliation theory.
  • 31.08.2017, C. Bartsch (WIAS Berlin), A mixed stochastic-deterministic approach to particles interacting in a flow.
  • 18.07.2017, Dr. D. Peschka (WIAS Berlin), Variational structure of viscous flows with contact line motion.
  • 01.06.2017, Dr. S. Ganesan (Indian Institute of Science, Bangalore), Stabilized three-field formulation of viscoelastic fluid flows.
  • 30.05.2017, Prof. C. Gräser (Freie Universität Berlin), Solving nonsmooth PDEs in Dune.
  • 11.04.2017, Prof. J. Chen (Zheijian University, China), Automatic and parallel mesh generation: Recent advances.
  • 06.04.2017, Prof. D. Silvester (University of Manchester, GB), Accurate time-integration strategies for modelling incompressible flow bifurcations.
  • 30.03.2017, Prof. J.H.M. ten Thije Boonkkamp (Eindhoven University of Technology, Netherlands), Complete flux schemes fOR conservation laws of advection-diffusion-reaction typ.
  • 28.03.2017, G. Pitton (SISSA, Italien), Accelerating augmented and deflated Krylov space methods for convection-diffusion problems.
  • 28.03.2017, Prof. L. Heltai (SISSA, Italien), Immersed Finite Element Methods for interface and fluid structure interaction problems: An overview and some recent results.
  • 16.03.2017, M. Cicuttin (CERMICS - ENPC, Frankreich), Implementation of Discontinuous Skeletal methods on arbitrary-dimensional, polytopal meshes using generic programming.
  • 02.03.2017, Dr. L. O. Müller (Norwegian University of Science and Technology), A local time stepping solver for one-dimensional blood flow.
  • 09.02.2017, Prof. M. Eikerling (Simon Fraser University, Kanada), Theory and modeling of materials for electrochemical energy systems.
  • 09.02.2017, Prof. G. Lube und Ph. Schröder (Georg-August-Universität Göttingen), Pressure-robust error estimates of exactly divergence-free FEM for time-dependent incompressible flows.
  • 02.02.2017, Dr. J. Mura (Pontificia Universidad Catolica de Chile, Chile), An automatic method to estimate 3D Pulse Wave Velocity from 4D-flow MRI data.
  • 26.01.2017, Dr. F. Dassi (Politecnico di Milano, Italien), The Virtual Element Method in three dimensions.
  • 12.01.2017, Dr. A. Gassmann (Leibniz-Instituts für Atmosphärenphysik, Kühlungsborn), Fluid dynamics on icosahedral staggered grids.
  • 17.11.2016, Prof. J. Novo (Universidad Autonoma de Madrid, Spain), Non inf-sup stable mixed finite element approximations to the evolutionary Stokes equations.
  • 17.11.2016, Dr. St. Weißer (Universität des Saarlandes), Convection-adapted BEM-based finite element method on tetrahedral and polyhedral meshes.
  • 22.09.2016, Dr. P. Farrell (WIAS Berlin), Scharfetter-Gummel schemes for non-Boltzmann statistics.
  • 15.09.2016, Prof. J. Shewchuk (University of California at Berkeley, USA), Restricted constrained delaunay triangulations.
  • 18.08.2016, A. Chern (TU Berlin), Fluid simulation using incompressible Schrödinger flow.
  • 04.08.2016, Ph. Lederer (TU Wien, Österreich), An exact divergence-free reconstruction operator for the Taylor--Hood element.
  • 21.07.2016, Dr. A. Wahab (Korea Advanced Institute of Science & Technology), A non-iterative algorithm for elastography using joint sparsity.
  • 28.06.2016, W. Huang (University of Kansas, USA), A new implementation of the MMPDE moving mesh method and applications.
  • 14.06.2016, Prof. A. Bradji (Université Badji Mokhtar-Annaba, Algerien), On the convergence order of gradient schemes for time dependent partial differential quations.
  • 14.06.2016, Ch. Wang (Northeastern University, China), Product design and engineering analysis technologies.
  • 09.06.2016, Dr. G. Printsypar (WIAS Berlin), Modeling of membranes for forward osmosis at different scales.
  • 02.06.2016, N. Alia (WIAS Berlin), Introduction to the project about optimal control of ladle stirring.
  • 24.05.2016, Prof. S. Kaya Merdan (Middle East Technical University, Ankara, Turkey), Numerical analysis of a fully discrete decoupled penalty-projection algorithm for MHD in Elsässer variables.
  • 12.05.2016, Prof. W. Dreyer (WIAS Berlin), Subtle properties of the barycentric velocity in mixture models.
  • 03.05.2016, L. Blank (WIAS Berlin), CGS --- Taking advantage of the irregular convergence behavior.
  • 28.04.2016, F. Neumann (WIAS Berlin), Quasi-optimality of a pressure-robust nonconforming finite element method for the Stokes-Problem.
  • 21.04.2016, Prof. Th. Apel (Universität der Bundeswehr München), Anisotropic mesh refinement in polyhedral domains: error estimates with data in L2.
  • 19.04.2016, M. Wolff (WIAS Berlin), Finite-element-method for the Stokes-Darcy equations in 3D.
  • 14.04.2016, Prof. K.-M. Weitzel (Philipps-Universität Marburg), Ionentransport durch feste Materie --- BIIT Experimente und numerische Beschreibung mittels Nernst-Planck-Poisson Theorie.
  • 10.03.2016, U. Wilbrandt (WIAS Berlin), Iterative subdomain methods for the Stokes-Darcy problem.
  • 03.03.2016, M. Hoffmann (FU Berlin), Adaptive finite element methods for Stokes--Darcy.
  • 23.02.2016, Dr. C. Bertoglio (Universidad de Chile, Chile), Noninvasive pressure drop estimation in blood flows.
  • 11.02.2016, C. Bartsch (WIAS Berlin), An assessment of solvers for saddle point problems emerging from the incompressible Navier-Stokes equations.
  • 21.01.2016, Dr. Ch. Merdon (WIAS Berlin), Pressure-robust finite element methods for Navier-Stokes discretisations.
  • 14.01.2016, Dr. J. Fuhrmann (WIAS Berlin), Generalized Nernst-Planck-Poisson systems: Modeling aspects andnumerical approaches.
  • 03.12.2015, Dr. A. Linke (WIAS Berlin), Towards pressure-robust mixed methods for the incompressible Navier--Stokes equations.
  • 26.11.2015, Dr. F. Dassi (WIAS Berlin), Achievements and challenges in anisotropic mesh generation.
  • 19.11.2015, Prof. Ch. Pflaum (Friedrich-Alexander Universität Erlangen-Nürnberg), Discretization of elliptic differential equations with variable coefficients on sparse grids.
  • 05.11.2015, J. Pellerin (WIAS Berlin), Simultaneous meshing and simplification of complex 3D geometrical models using Voronoi diagrams.
  • 24.09.2015, Yueyuan Gao (Universite Paris-Sud, France), Finite volume methods for first order stochastic conservation laws.
  • 11.09.2015, Dr. T. Benacchio (Met Office, UK), Towards scalable numerical weather and climate prediction with mixed finite element discretizations.
  • 03.09.2015, Dr. G. R. Barrenechea (University of Strathclyde, UK), Stabilising some inf-sup stable pairs on anisotropic quadrilateral meshes.
  • 01.09.2015, Dr. P. Knobloch (Charles University, Czech Republic), On linearity preservation and discrete maximum principle for algebraic flux correction schemes.
  • 25.06.2015, S. Hirsch (Charite - Universitätsmedizin Berlin), Compression-sensitive Magnetic Resonance Elastography and poroelasticity.
  • 16.06.2015, Prof. S. Ganesan (Indian Institute of Science), Finite element algorithms for massively parallel architectures.
  • 11.06.2015, Prof. J. Novo (Universidad Autonoma de Madrid, Spain), Local error estimates for the SUPG method applied to evolutionary convection-reaction-diffusion equations.
  • 04.06.2015, Dr. K. Schmidt (TU Berlin), On optimal basis functions for thin conducting sheets in electromagnetics and on efficient calculation of the photonic crystal bandstructure.
  • 28.05.2015, Dr. P. A. Zegeling (Utrecht University, The Netherlands), Adaptive grids for detecting non-monotone waves and instabilities in anon-equilibrium PDE model from porous media.
  • 30.04.2015, Dr. A. Caiazzo (WIAS Berlin), Stabilization at backflow.
  • 16.04.2015, L. Heltai (SISSA, Italy), Coupling isogeometric analysis and Reduced Basis methods for complex geometrical parametrizations.
  • 03.03.2015, Prof. S. Perotto (Politecnico di Milano, Italy), Adaptive Hierarchical Model (HiMod) reduction for initial boundary value problems.
  • 10.02.2015, Prof. R. Masson (Universite de Nice Sophia Antipolis, France), Gradient scheme discretizations of two phase porous media flows in fractured porous media.
  • 22.01.2015, S. Rubino (Universidad de Sevilla, Spain), Finite element approximation of an unsteady projection-based VMS turbulence model with wall laws.
  • 09.10.2014, Ph. Lederer (TU Wien), Hybrid Discontinuous Galerkin (HDG) methods for the incompressible Navier--Stokes Equations.
  • 02.10.2014, Prof. J. Lang (TU Darmstadt), Adaptive moving meshes in large eddy simulation for turbulent flows.
  • 30.09.2014, Prof. Weizhang Huang (University of Kansas, USA), Computation of eigenvalue problems with anisotropic diffusion operators.
  • 25.09.2014, Dr. J. Pellerin (WIAS Berlin), Accounting for the geometrical complexity of geological structural models in Voronoi-based meshing methods.
  • 10.07.2014, S. K. Ganesan (Indian Institute of Science, Bangalore), SUPG finite element method for PDEs in time-dependent domains.
  • 25.06.2014, Prof. L. Rebholz (Clemson University, USA), A connection between coupled and penalty projection timestepping schemes with FE spatial discretization.
  • 12.06.2014, A. Fiebach (Physikalisch-Technische Bundesanstalt Berlin), An introduction to semiconductor device simulation.
  • 12.06.2014, Elena Queirolo (EPFL, Switzerland), Isogeometrical Analysis for Navier-Stokes equations.
  • 27.05.2014, Prof. G. Barrenechea (University of Strathclude, UK), Curing inf-sup deficiencies: Two quick examples.
  • 22.05.2014, Dr. H. Stephan (WIAS Berlin), Deterministic and stochastic evolution equations and their connections.
  • 10.04.2014, Prof. J. Novo (Universidad Autonoma de Madrid, Spain), Stabilization of finite element approximations to the Stokes and Oseen equations.
  • 27.03.2014, Dr. A. Caiazzo (WIAS Berlin), Multiscale modeling of weakly compressible elastic materials in harmonic regime.
  • 27.03.2014, S. Molnos (Technische Universität Berlin), Controlling transversal instabilities of two-dimensional travelling waves in reaction-diffusion systems.
  • 26.03.2014, Dr. J.-F. Mennemann (Universität Wien), Simulation of nanoscale electronic devices using the Schrödinger equationwith open boundary conditions.
  • 25.03.2014, J. Neumann (WIAS Berlin), Stochastic bounds for quantities of interest in groundwater flow with uncertain data.
  • 20.03.2014, I. Ramis-Conde (IMACI, Spain), Multiscale modeling of palisade formation in glioblastoma.
  • 13.03.2014, L. O. Müller (Universita degli Studi di Trento, Italy), Well-balanced finite volume schemes for one-dimensional blood flow models: Application to a closed-loop model for the cardiovascular system.
  • 20.02.2014, PHD A. Fabri (GeometryFactory), CGAL - The Gomputational Geometry Algorithms Library.
  • 18.02.2014, Dr. C. Bertoglio (TU München), Forward and inverse modeling of the cardiovascular system: How PDE's can help to improve clinical outcomes.
  • 23.01.2014, J. Pellerin (ENSG-Universite de Lorraine, France), Accounting for the geometrical complexity of geological models inmeshing methods based on Voronoi diagrams.
  • 19.12.2013, F. Litzinger (Freie Universität Berlin), Diskretisierung der stationären inkompressiblenNavier-Stokes-Gleichungen in 3D auf unstrukturierten Tetraedergittern.
  • 19.12.2013, M. Hoffmann (Freie Universität Berlin), Das Navier-Stokes-Darcy Problem.
  • 07.11.2013, F. Dassi (Politecnico di Milano), Surface mesh simplification strategy forsaptial regression analysis of cortical surface data.
  • 24.10.2013, Prof. V. A. Galkin (Surgut State University, Russia), Generalized solutions of the smolukhovskii semilinear systemof equations and their approximations.
  • 24.09.2013, F. Dassi (Politecnico di Milano), A curvature-adapted anisotropic surface remeshing method.
  • 05.09.2013, Prof. A. Bradji (University of Badji Mokhtar Annaba, Algeria), Some recent results on the convergence order of finite volume methods for evolution equations on general nonconforming multidimensional spatial meshes.
  • 20.08.2013, F. Dassi (Politecnico di Milano), Anisotropic error estimates for pde defined on surfaces.
  • 11.07.2013, Prof. J. Shewchuck (University of California at Berkeley), Fast segment insertion and incremental construction ofconstrained Delaunay triangulations.
  • 11.07.2013, J. Neumann (WIAS Berlin), Multi-level Monte-Carlo methods for SPDE.
  • 10.07.2013, Ch. Merdon (HU Berlin), Aspects of guaranteed error control for finite element approximationsin computations for PDEs.
  • 10.07.2013, J. Dannberg (GFZ Potsdam), Modelling mantle plumes with ASPECT: an advanced solver forproblems in earth's convection.
  • 10.07.2013, C. Suciu (WIAS Berlin), Direct discretizations of uni- and bi-variate population balancesystems on tensor-product meshes.
  • 10.07.2013, V. Travnikov (TU Dresden), Forschungsarbeiten an der Technischen Universität Dresden.
  • 04.07.2013, J. Dannberg (GFZ Potsdam), Modelling mantle plumes with ASPECT: an advanced solver forproblems in earth's convection.
  • 02.07.2013, M. Arias-Chao (Alstom Power Ltd., Switzerland), Calibration and uncertainty quantification for gas turbines models.
  • 27.06.2013, St. Moore (RICAM, Linz, Austria), Discontinuous Galerkin isogeometric analysis for elliptic PDEs on manifolds.
  • 30.05.2013, L. Schumacher (Humboldt Universität zu Berlin), Isogeometric analysis for scalar convection-diffusion equations.
  • 24.05.2013, Prof. H.-J. Starkloff (Westsächsische Hochschule Zwickau), On some questions related to generalized polynomial chaos expansions.
  • 23.04.2013, Prof. J. Wensch (TU Dresden), Efficient time integration methods for the compressible Euler equations in atmospheric dynamics.
  • 23.04.2013, M. Rother (Otto-von-Guericke-Universität Magdeburg), Eine Reise ins Ich und zurück in 20 Minuten.
  • 18.04.2013, M. Schmuck (Imperial College London), Upscaling of ionic transport equations in strongly heterogeneous media and finite element approximations.
  • 18.04.2013, Dr. L. Kamenski (The University of Kansas, USA), Anisotrope Gitter: Den Zusammenhang zwischen Gittern und Eigenschaften der Diskretisierungsverfahren richtig verstehen.
  • 02.04.2013, Ch. Merdon (HU Berlin), Garantierte Fehlerkontrolle bei PDGLen mit aktuellen Equilibrierungstechniken.
  • 02.04.2013, G. Müller (TU Berlin), Beispiele numerischer Verfahren für PDEs und Optimalsteuerungsprobleme.
  • 02.04.2013, R. Richter (Bundesanstalt für Materialforschung und -prüfung (BAM)), Numerische Verfahren für die aktive Thermografie zur Untersuchung von Rückwandgeometrien und Singularitäten einer geometrischen Evolutionsgleichung (MCF).
  • 14.02.2013, Dr. L. Kamenski (The University of Kansas), Adaptive finite elements with anisotropic meshes.
  • 07.02.2013, Prof. G. Barrenechea (University of Strathclude, UK), Eigenvalue enclosures for the Maxwell operator.
  • 07.02.2013, Dr. P. Knobloch (Charles University, Institute of Numerical Mathematics, Czech Republic), Mesh optimization for convection-diffusion problems.
  • 31.01.2013, M. Bessemoulin-Chatard (Universite Blaise Pascal, Clermont-Ferrand II), A finite volume scheme for a Patlak-Keller-Segel model with cross-diffusion.
  • 24.01.2013, S. Ullmann (TU Darmstadt), POD-Galerkin reduced-order modeling of flow problems with stochastic boundary conditions.