Numerical Investigation of 3D Flows over Energy-Dissipation Porous Media
Date Issued
2011
Date
2011
Author(s)
Chang, Chia-Ming
Abstract
The main objective of this research is to investigate the effect of porous cylinders on flow patterns. The standard k–ε turbulence model and the volume of fluid method (VOF) are used to simulate 3-D free surface flows. The resistant force generated by porous cylinders is performed by porous media theory. The computed results are verified by the available experimental data and are in consistent with the experiment data. In addition, we are concerned with how a large area is protected behind the porous cylinder, so a critical pressure is defined to estimate the protection area. Through several kinds of porosity are used in simulations, it is found that there is the largest protection area when the porosity is around 0.43. Thus, we call it as the optimal porosity in this study.
Finally, we apply our model to flows past two kinds of singled-row cylinders, porous cylinders and solid cylinders. From the numerical results, we can conclude that flows past porous cylinders are more stable than those past solid cylinders. The number of cylinders is in proportional to their protection area.
Subjects
Porous cylinder
Best porosity
Single-row cylinder
Standard k–ε turbulence model
Volume of Fluid
Porous media
Type
thesis
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