Experimental study on the heat transfer of heat sink with bio-mimetic oscillating foil》.pdfVIP

International Communications in Heat and Mass Transfer 68 (2015) 130–136 Contents lists available at ScienceDirect International Communications in Heat and Mass Transfer j ournal homepage: www.el sevier.c om/l ocate/ ichmt Experimental study on the heat transfer of heat sink with bio-mimetic oscillating foil☆ Han-Chieh Chiu a, Ren-Horn Hsieh a, Yu-Jen Chiu a, Jer-Huan Jang b,⁎, Wei-Chen Lin a a Department of Mechanical Engineering, Taipei Chengshih University of Science and Technology, Pei-Tou, Taipei 112, Taiwan b Department of Mechanical Engineering/Battery Research Center of Green Energy, Ming Chi University of Technology, Taishan, New Taipei City 243, Taiwan a r t i c l e i n f o a b s t r a c t Available online 4 September 2015 This paper experimentally investigates the heat transfer performance and characteristics of a heat sink with bio- mimetic oscillating foil. The oscillating foil is driven by a novel mechanism of grooved cam with linkage. The air Keywords: flow is drawn into a rectangular duct through the motion of the bio-mimetic oscillating foil. Various heat sinks Oscillating foil were set at the outlet of the duct to study the thermal performance. Two types of grooved cams were designed Flexural stiffness to obtain different angular velocity profiles for the oscillating foils. The angular velocity was specified as fast for- Strouhal number ward/slow backward and sinusoidal patterns. Foils with three flexural stiffness values were utilized in the study. Effective the