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First Symposium on Turbulence and Shear Flow Phenomena
September, 12-15, 1999, Doubletree Resort, Santa Barbara, California, USA

DOI: 10.1615/TSFP1

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

pages 265-270
DOI: 10.1615/TSFP1.440
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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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