Numerical analysis of flow structures behind the bluff body at different aspect ratio

2nd International conference on Advances in Mechanical Engineering

Sharma, Aditya^1 ; Kumar, Pankaj^1 ; Singh, Santosh Kumar^1

Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu

603203, India^1

关键词: Blockage ratio;    Bluff body;    Commercial software;    Different shapes;    Mean pressures;    Strong interaction;    Subcritical Reynolds numbers;    Turbulent kinetic energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/402/1/012056/pdf
DOI  :  10.1088/1757-899X/402/1/012056

来源: IOP

【 摘 要 】

The present paper aimed for the numerical study on the flow structures behind the bluff body with different shapes. The variation of shapes like circular to elliptical was obtained by changing the major to minor axis ratio while keeping the Reynolds number constant. This numerical study was done with help of finite volume method using commercial software Ansys-Fluent at the lower subcritical Reynolds number, i.e., 5000and 10000 for comparison of different parameter variations separately. As the earlier studies reveals the significant effect of blockage ratio on flow features on circular cylinder, this work will be extended for different aspect ratio. The basic results, which are validated against the published results, shows the flow feature are highly sensitive to shape and blockage ratio even for different shapes. The mean pressure and turbulent kinetic energy for different blockage and aspect ratio is presented and found the strong interactions between them.