Self-Pumped Coolant Circulation Driven by Thermal Gradient over Microstructures

16th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Lobato-Dauzier, Nicolas^1 ; Genot, Anthony J.^2 ; Fujita, Hiroyuki^1

CIRMM-Institute of Industrial Science, University of Tokyo, Japan^1

LIMMS/CNRS, Institute of Industrial Science, University of Tokyo, Japan^2

关键词: Backflow;    Geometrical optimization;    Gradient of surface tension;    Gradient of temperature;    Marangoni effects;    Passive cooling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/773/1/012104/pdf
DOI  :  10.1088/1742-6596/773/1/012104

来源: IOP

【 摘 要 】

We propose a passive cooling device which converts thermal energy into fluid flow via Marangoni effect: a gradient of temperature induces a gradient of surface tension. This in turn triggers a fluid flow at the air/liquid interface which runs transversally to the heat flow. We show how to amplify the global fluid flow thanks to geometrical optimization. We also show how the addition of an asymmetric small wall across the channel reduces the backflow and improves our device.