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ISBN 打印: 1-56700-135-1

Turbulence and Shear Flow Phenomena -1 First International Symposium
PUBLISHING DURING
COVID-19

INTER-PARTICLE COLLISIONS IN TURBULENT FLOWS: A STOCHASTIC LAGRANGIAN MODEL

Abstract

A stochastic inter-particle collision model to be applied in the frame of the Euler/Lagrange approach is introduced, which accounts for the correlated motion of particles in turbulent flows. The model relies on the generation of a fictitious collision partner, whereby no information is required on the actual position and direction of motion of the surrounding particles. The occurrence of a collision is decided based on the collision probability according to kinetic theory, but considering the correlation of the velocities of colliding particles. For validating the collision model results from large eddy simulations are used for monodisperse particles and a binary mixture of particles being dispersed in a homogeneous isotropic turbulence.
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