2018 : Numerical simulation of cross-flow around four circular cylinders in-line square configuration near a plane wall at supercritical Reynolds number

Prof. Dr. Ir. Tri Yogi Yuwono DEA.

Year

2018

Published in

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Abstract

In this research, it would be investigated numerically the effects of spacing between centres of cylinders (L) on flow characteristics around four circular cylinders in in-line square configuration near a plane wall at supercritical Reynolds number. A spacing ratio between centres of cylinders (L/D) would be varied. It is set at L/D = 2.0, 2.7, and 4.0, while a gap ratio between the surface of lower cylinders and the wall (G/D) was fixed at 0.2. To analyse flow characteristics around cylinders is used FLUENT 6.3.26 software. Two-dimensional Unsteady Reynolds Averaged Navier Stokes equations and SST k-ω turbulence equations are solved with finite volume method. This simulation was performed at Reynolds number 8.4 Ã? 106 based on a single circular cylinder diameter and free stream velocity. The numerical results show that at supercritical Reynolds number separation point of the upstream cylinders and the …