Numerical Investigation of 3D Flows through Porous Cylinders
Date Issued
2012
Date
2012
Author(s)
Wang, Wan-Chi
Abstract
In the research, it is aimed to investigate the effect of flow through porous cylinders by using the numerical method. A three-dimensional commercial computational fluid dynamic (CFD) software FLUENT is used to simulate the separated turbulent flows around porous cylinders. The standard k–ε turbulence model and the volume of fluid method (VOF) are involved in the simulation. To present the resistance on the fluid by porous cylinders, the porous media theory is adopted herein. It is shown that the simulated results have good agreement with the experimental results.
Furthermore, to discuss the resistant force on the cylinders, flows past single porous cylinder with various porosities are tested. It is found that the resistant force is in adverse proportion to the porosity. Finally, a series of single-row of cylinders with various arrangements, i.e. the number of cylinders, the interval between cylinders and the angle between one row of cylinders and one channel sidewall, are discussed. It can be concluded that the resistant forces on the cylinders decrease as the cylinder number increased, the interval between two cylinders decreased and the angle decreased, respectively.
Subjects
porous cylinder
standard k–ε turbulence model
volume of fluid
porous media theory
Type
thesis
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