Numerical Study of Solid Particle Deposition on a Square Filter Using Lattice Boltzmann Method

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Abstract

In this study, the motion of solid particles and fluid flow pattern around square cylinders is simulated. Two dimension Lattice Boltzmann method (LBM) is used to solve momentum and energy equation. To achieve this aim, first, the isothermal and nonisothermal fluid flow around obstacle is simulated by LBM; then, transport of the particles are evaluated while the equation of motion is employed. In this context, Lagrangian method is applied for simulating solid particles where the effect of particles on the flow is ignored. According to the obtained results, simulating the isothermal flow around the circular cylinder shows that with increasing Reynolds number decreased frequency of the flow. Also, investigating on nonisothermal flow around obstacle shows that with increasing blockage ratio, Nusselt number was increased. The results shows that with increasing Reynolds number deposition of small particles are increased, but deposition of large particles at low Reynolds number are better. Thermophoresis force is affected on particle smaller than 1µm and capture efficiency of particles was increased. Our results are good agreement with previous theoretical predictions and experimental observation.

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References

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Journal of Solid and Fluid Mechanics
Volume 5, Issue 2 - Serial Number 2
July and August 2015
Pages 249-260

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