Air Flow around and through a Permeable Semi-Circular Cylinder‡ ,Chemical Engineering & Technology

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Air Flow around and through a Permeable Semi-Circular Cylinder‡
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2021-12-15 , DOI: 10.1002/ceat.202100439
Rajvinder Kaur ₁ , Sapna Sharma ₁ , Avinash Chandra ₂

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An unconfined air flow across a semi-circular permeable/porous cylinder is numerically investigated for different Reynolds (Re) and Darcy numbers (Da) at a fixed value of porosity. The Darcy-Brinkman-Forchheimer model has been administered to deal with the flow field inside the porous cylinder. The governing equations are solved by using the finite element method-based commercial software COMSOL Multiphysics. The obtained flow field is analyzed by streamline profiles and vorticity contours. The collective impact of Re and Da on the drag coefficient is evaluated. At low Da values, the cylinder resembles the solid cylinder as the vorticity contours and streamlines do not infiltrate the porous media. The increment in Da leads to penetration of streamlines and vorticity contours through the porous cylinder. The drag coefficient retained an inverse relationship with Re and showed a complex relationship with Da.

中文翻译：

空气在可渗透半圆形圆柱体周围流动‡

在固定的孔隙率值下，对不同的雷诺数 ( Re ) 和达西数 ( Da ) 进行了数值研究，以数值方式研究了穿过半圆形可渗透/多孔圆柱体的无约束气流。Darcy-Brinkman-Forchheimer 模型已用于处理多孔圆柱体内的流场。使用基于有限元法的商业软件 COMSOL Multiphysics 求解控制方程。通过流线剖面和涡度等值线分析获得的流场。评估了Re和Da对阻力系数的集体影响。在低Da值时，圆柱体类似于实心圆柱体，因为涡量等值线和流线不会渗入多孔介质。Da的增加导致流线和涡度等值线穿过多孔圆柱体。阻力系数与Re保持反比关系，与Da呈复杂关系。

更新日期：2021-12-15

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