Numerical Investigation of the Flow Structure on Ground Surface Mounted Square Prism

Yıl 2024, Cilt: 1 Sayı: 1, 21 - 32, 01.07.2024

Onur Küçükkurt Cuma Karakuş

https://doi.org/10.5281/zenodo.12566763

Öz

The three-dimensional flow structure on a square prism mounted on a horizontal ground was investigated numerically using the Ansys Fluent program for Reynolds number Re = 250, 2500 and 〖2.5*10〗^6, using the Standard k-ε turbulence model equations. In the study, a square prism with a large Depth Ratio (DR = 4) was used. As a result, the information was obtained about the characteristic structure of the flow around the object. For z/h= 0.05, 0.5, 0.75 and 1, the top views of the Streamlines and Turbulent kinetic energy TKE data formed behind the ground surface-mounted square prism are shared. Streamlines and Turbulent kinetic energy TKE side views formed in the front, top and rear flow regions of the ground surface-mounted square prism for y/D=0, 0.25, 0.5, 0.75, 1 and 1.25 are presented. On the prism surfaces, the structure of the upstream and downstream flow changed due to separation from the prism front surface and reattachment of the flow. This situation revealed the effect of the Depth Ratio on the structure of the flow topology on the object by changing the drifting flow structure and turbulent kinetic energy structure in the wake region. As the Reynolds number acting on the prism increased, the size of the vortex decreased noticeably.

Anahtar Kelimeler

3D Square Prism, Separeted Flows, Turbulence Simulation

Kaynakça

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