Numerical Analysis on the Performance of Heatsink with Microchannels

In this paper, numerical simulation is used to investigate the thermal performance of liquid cooling heatsink with microchannels due to geometric arrangement. Commercial software ICEPAK is utilized for the analysis. The considered parameters include aspect ratio, porosity and the length and height of microchannel. The aspect ratio varies from 3 to 16 and the length of microchannel is 10mm, 14mm, and 18mm. The height of microchannel is 2mm, 3mm and 4mm. It is found short channel have better thermal efficiency than long channel at 490Pa. No matter the length of channel the best aspect ratio is 4. It is also noted that pressure difference at 2940Pa the best aspect ratio from 4 to 8, it means pressure difference affect aspect ratio, effective thermal resistance at low pressure difference but lower effective thermal resistance at high pressure difference.

Authors:

• Jer-Huan Jang
• Han-Chieh Chiu
• Wei-Chung Yeih
• Jia-Jui Yang
• Chien-Sheng Huang

Keywords:

• thermal resistance
• liquid cooling
• microchannels
• numerical analysis
• pressure difference

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