Date:

2025-04-30

Title of Paper:

Bubble behavior and heat transfer of nucleate pool boiling on micro-pin-finned surface in microgravity

Journal:

Chinese Physics Letters

Summary:

Nucleate pool boiling on micro-pin-fnned surface structure is proposed for efciently cooling electronic components with high heat fux in microgravity, and was verifed by experiments performed utilizing the drop tower Beijing. Micro-pin-fns with the dimensions of 50 × 60μm2 (thickness × height) and the space of 50μm were fabricated on the chip surface by the dry etching technique. FC-72 was used as the working fuid. Nucleate pool boiling of FC-72 on a smooth surface was also tested for comparison. Unlike much obvious deterioration of heat transfer of nucleate pool boiling on the smooth surface in microgravity, constant heater surface temperature of nucleate pool boiling for the micro-pin-fnned surface was observed, even though a large coalesced bubble completely covered the surface under microgravity condition. The performance of high efficient heat transfer on micro-pin-fnned surface is independent of the gravity, which stems from the sufficient supply of fresh liquid to the heater surface due to the capillary forces.

Co-author:

J. J. Wei*,Y. F. Xue, J. F. Zhao, J. Li

Volume:

28

Page Number:

016401

Translation or Not:

No

Date of Publication:

2010-07-08