Chatterjee, Dipankar and Gupta, Satish Kumar (2015) Convective transport around a rotating square cylinder at moderate Reynolds numbers. Numerical Heat Transfer, Part A: Applications: An International Journal of Computation and Methodology, 67 (12). pp. 1386-1407.

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Abstract

Two-dimensional numerical simulation is performed to analyze the thermofluidic transport around a rotating square cylinder in an unconfined medium. The convective transport originates as a consequence of the interaction between a uniform free-stream flow and the flow evolving due to the rotation of the sharp-edged body. A finite volume-based method and a body-fitted grid system along with the moving boundaries are used to obtain the numerical solution of the incompressible Navier–Stokes and energy equations. The Reynolds number based on the free-stream flow is considered in the range 10 ≤ Re ≤ 200, and the dimensionless rotational speed of the cylinder is kept 0 ≤ Ω ≤ 5. Depending on the Reynolds number and the rotational speed of the cylinder, the transport characteristics change. For the range 10 ≤ Re < 50, the flow remains steady irrespective of the rotational speed. In the range 50 ≤ Re ≤ 200, regular low-frequency Kármán vortex shedding (VS) is observed up to a critical rate of rotation (Ωcr ). Beyond Ωcr , the global convective transport shows a steady nature. The rotating circular cylinder also shows likewise degeneration of Kármán VS at some critical rotational speed. However, the heat transfer behavior varies significantly with a rotating circular cylinder. Such thermofluidic transport around a spinning square in an unconfined free-stream flow is reported for the first time.

Item Type:	Article
Subjects:	Computational fluid dynamics
Depositing User:	Dr. Sarita Ghosh
Date Deposited:	05 Aug 2016 07:26
Last Modified:	05 Aug 2016 07:26
URI:	http://cmeri.csircentral.net/id/eprint/198

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