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主页 旧刊 有关人员 未来大会 American Society of Thermal and Fluids Engineering

ISSN 在线: 2379-1748

ISBN 打印: 978-1-56700-517-2 (Flash drive)

5-6th Thermal and Fluids Engineering Conference (TFEC)
May, 26–28, 2021 , Virtual

NUMERICAL SIMULATION OF SOLUTE TRANSPORT FROM MULTIPLE CYLINDERS

Get access pages 301-329
DOI: 10.1615/TFEC2021.cmd.037016

摘要

Numerical simulation of flow over interacting cylinders of equal diameters in uniform unbounded flow is performed using a novel hybrid immersed boundary method. In the first case, flow around a row of in-line cylinders at the Reynolds number of 90 is investigated, focusing on how the cylinder wake and mass transfer changes with the number of cylinders as well as the distance between them. The number of cylinders is varied between 2 and 5 while the center to center distance between consecutive cylinders is varied between 1.05 and 9 cylinder diameters. A qualitative picture of the vortical structures behind each cylinder is captured using instantaneous vorticity as well as average velocity. For small separation between cylinders, closed wake between cylinders is observed and vortices are shed some distance downstream of the trailing cylinder. An envelope of fluid around the whole configuration is formed which inhibits scalar transport from the cylinders to the free stream. As the gap increases, the wake between cylinders become unstable and vortex shedding between cylinder is observed, with instability increasing with distance downstream of the leading cylinder. In the second case, cylinders are arranged in side-by-side fashion and vortex interaction as well as scalar transport is investigated. When the cylinders are closely packed, they behave like a single bluff body. For large distance between cylinders, a well-defined wake is observed behind each cylinder.
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