Water cooled corrugated minichannel heat sink for electronic devices: Effect of corrugation shape

The main objective of the present study is to identify the potential of different geometries of the water cooled corrugated minichannel heat sink (CMCHS), i.e. triangular, trapezoidal, and sinusoidal, in comparison with the commercially available straight minichannel heat sink. The effects of the corrugation-length, corrugation-amplitude, and Reynolds number are investigated for each CMCHS. The results indicate that the trapezoidal CMCHS has the highest values of Nusselt number and pumping power, and the triangular and sinusoidal CMCHSs come in the second and third. It is also found that both the corrugation-length and the corrugation-amplitude have considerable effects on the thermal-hydraulic performances of the CMCHSs; Nusselt number and pumping power enhance, as the corrugation-length decreases and the corrugation-amplitude increases. Finally, the highest values of the heat transfer rate to the pumping power ratio are detected for the sinusoidal CMCHS.