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http://dx.doi.org/10.5407/jksv.2020.18.1.067

Numerical Analysis of Heat Transfer System Using a Symmetric Flexible Vortex Generator in a Poiseuille Channel Flow  

Kim, Jeonghyeon (Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology)
Park, Sung Goon (Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of the Korean Society of Visualization / v.18, no.1, 2020 , pp. 67-73 More about this Journal
Abstract
Flexible structures have been adopted in heat transfer systems as vortex generators. The flexible vortex generators immersed in a flow show a self-sustained oscillatory motion, which enhances fluid mixing and heat transfer. In the present study, the vortex generators in a two-dimensional channel flow are numerically investigated, and they are symmetrically mounted on the upper and lower walls with an inclination angle. The momentum interaction and heat transfer between the flexible vortex generators and the surrounding fluid are considered by using an immersed boundary method. The inclination angle is one of the important factors in determining the flapping kinematics of the flexible vortex generators. The flapping amplitude increases as the inclination angle increases, thereby enhancing fluid mixing. The heat transfer is enhanced up to 80% comparing to the baseline channel flow.
Keywords
Convective heat transfer; Flexible vortex generator; Immersed boundary method;
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