Analysis of relative dispersion of two particles by Lagrangian stochastic models and DNS methods
- Kurbanmuradov, Orazgeldi
- Orszag, Steven A.
- Sabelfeld, Karl K.
- Yeung, P. K.
2010 Mathematics Subject Classification
- 65C05 76N20
- Turbulent flows, Lagrangian trajectories, separation vector, DNS method
Comparisons of the Q1D against the known Lagrangian stochastic well-mixed quadratic form models and the moments approximation models are presented. In the case of modestly large Reynolds numbers turbulence (Re λ ⋍ 240) the comparison of the Q1D model with the DNS data is made. Being in a qualitatively agreemnet with the DNS data, the Q1D model predicts higher rate of separation. Realizability of Q1D model extracted from the transport equation with a quadratic form of the conditional acceleration is shown.
- Monte Carlo Methods Appl., 7 (2001) pp. 245--263.