WIAS Preprint No. 626, (2000)

Analysis of relative dispersion of two particles by Lagrangian stochastic models and DNS methods



Authors

  • Kurbanmuradov, Orazgeldi
  • Orszag, Steven A.
  • Sabelfeld, Karl K.
  • Yeung, P. K.

2010 Mathematics Subject Classification

  • 65C05 76N20

Keywords

  • Turbulent flows, Lagrangian trajectories, separation vector, DNS method

Abstract

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.

Appeared in

  • Monte Carlo Methods Appl., 7 (2001) pp. 245--263.

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