Evaluation of a new designed microchannel heat sink for CPU cooling based on IR – thermography synchronized with high-speed flow visualization

July 1904

The design and implementation of an experimental boiling loop is studied in this work. MEMS fabrication techniques are used to assemble the integrated multi-microchannel evaporative cooling device (iMMECo) in a single silicon substrate with optical access to the coolant flow. Tests on thermo-fluid-dynamic performance of the iMMECo are performed making use of synchronized high-speed visualization and high-speed IR thermography, confirming the existence of flow instability, backflow and non-uniform distribution of flow among the channels, all necessary to define the optimum range of operation. Flow boiling curves experimentally obtained suggest that the smaller the inlet passage, the lower the heat flux for boiling incipience to occur, resulting in a lower overshoot of wall temperature and lower overall surface temperature. On the other hand, pressure drop is highly increased for smaller inlet passages, increasing the pumping needs.

Authors in the community:

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  S

  Susana Isabel Pinheiro Cardoso de Freitas

  ist14366

18th International Symposium on Applications of Laser Techniques to Fluid Mechanics

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Lisbon, Portugal

physical-sciences - Physical sciences

eng - English