Influence of insertion of holes in the middle of obstacles on the flow around a surface-mounted cube

Rostane, Brahim; KHALED, ALIANE; Abboudi, Said

doi:10.22061/jcarme.2019.3984.1472

Document Type : Research Paper

Authors

¹ MECACOMP Laboratory, University of Tlemcen, FT, Department of Mechanics, BP 230, 13000 Tlemcen, Algeria

² Department of mechanical engineering, Faculty of Technologie, University of Tlemcen, Tlemcen, Algeria

³ ICB UMR 6303, CNRS, Univ. Bourgogne Franche-Comté, UTBM Département COMM, F-90010, Belfort, France

https://doi.org/10.22061/jcarme.2019.3984.1472

Abstract

The aim of our study is to analyze the impact of insertion holes in the middle of obstacles on the flow around a surface-mounted cube, In order to do this; we studied four configurations of obstacles in a channel with a Reynods number based on obstacle height ReH = 40000. The hexahedral structured meshes were used to solve the fluid dynamics equations .The finite volume method are employed to solve the governing equations using the ANSYS CFX code and the turbulence model k-ω SST. The streamwise velocity profiles, the Time-averaged streamlines, the turbulence kinetic energy and the drag coefficient are presented. The results showed the appearance of a second vortex behind obstacles with hole from diameter D/H=0.2. The turbulence kinetic energy was greater on top of the obstacle, it was more intense for the obstacle without hole, this intensity decreased as the hole diameter increased. The drag coefficient was improved only for the case D/H=0.32

Graphical Abstract

Keywords

20.1001.1.22287922.2019.9.1.6.4

Main Subjects

Computational Fluid Dynamics (CFD)

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