SIMULATION OF PARTICLE DISPERSION AND DEPOSITION IN FLOW AROUND TWO CIRCULAR CYLINDERS IN A SIDE-BY-SIDE ARRANGEMENT

- Journal title : Journal of computational fluids engineering
- Volume 21, Issue 2, 2016, pp.81-89
- Publisher : Korea Society of Computational Fluids Engineering
- DOI : 10.6112/kscfe.2016.21.2.081

Title & Authors

SIMULATION OF PARTICLE DISPERSION AND DEPOSITION IN FLOW AROUND TWO CIRCULAR CYLINDERS IN A SIDE-BY-SIDE ARRANGEMENT

Hwang, Dongjun; Kim, Dongjoo;

Hwang, Dongjun; Kim, Dongjoo;

Abstract

Numerical simulations are carried out for the fluid flow and particle transport around two nearby circular cylinders in a side-by-side arrangement. The present study aims to understand the effects of the particle Stokes number and the spacing between two cylinders on particle dispersion and deposition characteristics. Simulations are based on an Eulerian-Lagrangian approach where the motion of particles is calculated by a Lagrangian approach based on one-way coupling. Results show that the flow structure is very different depending on the cylinder spacing, eventually affecting the overall pattern of particle dispersion significantly. It is also found that particles with smaller Stokes number tend to be distributed more uniformly in the wake of two cylinders, being located even inside the vortex cores. Meanwhile, particle deposition is analyzed in terms of the deposition efficiency and deposition location. The deposition efficiency of particles strongly depends on the Stokes number, whereas it is slightly affected by the cylinder spacing. The deposition location gets wider as the Stokes number increases, and it becomes asymmetric about the center of each cylinder as the cylinders get close.

Keywords

CFD;circular cylinder;side-by-side arrangement;particle dispersion;particle deposition;

Language

Korean

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