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Главная Архив Thermal Letter Оргкомитет Будущие конференции AIHTC
International Heat Transfer Conference 12

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Direct numerical simulation of fluid flow and heat transfer past a cylinder with circular fins

Dong Hyuk Lee
School of Mechanical Engineering, Pusan National University, San 30, Jangjeon-Dong, Kumjung-Ku, Pusan 609-735, Korea

Man Yeong Ha
School of Mechanical Engineering Pusan National University, Jang Jeon 2-Dong, Geum Jeong Gu, Busan 609-735, Korea

Hyun Sik Yoon
Advanced Ship Engineering Research Center, Pusan National University Busan, 609-735, Korea

S. Balachandar
Department of Theoretical and Applied Mechanics, University of Illinois, Urbana, IL 61801, USA

DOI: 10.1615/IHTC12.1440
6 pages

Аннотация

Three-dimensional and time-dependent solution for the fluid flow and heat transfer past a circular cylinder with fins is obtained using accurate and efficient spectral methods. A Fourier expansion with a corresponding uniform grid is used along the circumferential direction. A spectral multidomain method with a corresponding Chevyshev collocation is used along r − z plane to handle fins attached to the surface ofa circular cylinder. At the Reynolds number of 300 based on a cylinder diameter, results with fins are compared with those without fins in order to see the effects of the presence of fins on three-dimensional and unsteady fluid flow and heat transfer past bluff body. The detail structures of fluid flow and temperature field are obtained as a function of time to investigate how the presence of fins changes heat transfer mechanism related to the vortical structure in the wake region.

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