Numerical study of heat transfer enhancement of channel via vortex-induced vibration

Junxiang Shi, Jingwen Hu, Steven R. Schafer, Chung-Lung Chen*


研究成果: Article同行評審

66 引文 斯高帕斯(Scopus)


Thermal diffusion in a developed thermal boundary layer is considered as an obstacle for improving the heat transfer rate of air-cooled heat sinks. In this work, a passive method using vortex-induced vibration (VIV) is introduced to disrupt the thermal boundary layer and thereby increase the heat transfer rate. A cylinder with a flexible plate is placed in a clean channel; the vortex shedding due to the cylinder gives rise to the oscillation of the plate downstream. The consequent flow-structure-interaction (FSI) strengthens the disruption of the thermal boundary layer by vortex interaction with the walls, and improves the mixing process. This novel concept is demonstrated by a two-dimensional modeling study at ReD = 204.8, 245.7, 286.7, 327.7, and two inlet temperature profiles. The results indicate the VIV can significantly increase the average Nusselt (Nu) number, with a maximum enhancement of 90.1% over that of a clean channel.

頁(從 - 到)838-845
期刊Applied Thermal Engineering
出版狀態Published - 5 9月 2014


深入研究「Numerical study of heat transfer enhancement of channel via vortex-induced vibration」主題。共同形成了獨特的指紋。