Numerical Study on the Flow Past Three Cylinders in Equilateral-Triangular Arrangement at Re = 3 × 106

One of the most common systems in engineering problems is the multi-column system in the form of an equilateral-triangular arrangement. This study used three-dimensional numerical simulations to investigate the flow around three cylinders in this arrangement at the super-critical Reynolds number Re=...

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Bibliographic Details
Published in:Applied sciences 2022-11, Vol.12 (22), p.11835
Main Authors: Zhang, Mohan, Yin, Bo, Guo, Dilong, Ji, Zhanling, Yang, Guowei
Format: Article
Language:English
Subjects:
Cylinders
Flow distribution
flow interference
Fluid dynamics
Fluid flow
Hydrodynamics
improved delayed-detached eddy simulation (IDDES)
Investigations
Pressure distribution
Reynolds number
vortex dynamics
vortex interaction
Vortices
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Summary:One of the most common systems in engineering problems is the multi-column system in the form of an equilateral-triangular arrangement. This study used three-dimensional numerical simulations to investigate the flow around three cylinders in this arrangement at the super-critical Reynolds number Re=3×106, concentrating on the influence on the spacing ratio (L/D) among cylinders. The instantaneous vortex structures, Strouhal numbers, fluid force coefficients, and pressure distributions are analyzed thoroughly. The present study demonstrated that fluid dynamics is sensitive to L/D, by which five different flow patterns are classified, namely single bluff body flow (L/D≤1.1), deflected gap flow (1.2≤L/D≤1.4), anti-phase flow (1.5≤L/D≤2.3), in-phase flow (2.5≤L/D
ISSN:2076-3417
2076-3417
DOI:10.3390/app122211835