The bubble dynamics for flow boiling in a single microchannel was experimentally studied in the present work. A platinum heater was used as the nucleation site in a 0.1 mm hydraulic diameter PDMS (Polydimethylsiloxane) microchannel with FC72 as the working fluid. A high speed camera was used to visualize the bubble dynamics. The results show that the bubbles grow much slower than predicted by standard correlations due to the very large convective heat transfer to the liquid flowing around the bubble in the microchannel. The results also show that the bubble departure frequency, heat flux and bubble departure diameter are well correlated by two dimensionless parameters that also include the effect of the properties. Finally, the results suggest very high speed dryout and rewetting of the heater surface during the bubble growth with a very short period of more complete rewetting of the heater surface when a bubble separates from the main vapor stem.
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ASME/JSME 2011 8th Thermal Engineering Joint Conference
March 13–17, 2011
Honolulu, Hawaii, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-3892-1
PROCEEDINGS PAPER
Nucleate Boiling Bubble Dynamics in a PDMS Microchannel With a Single Nucleation Site
Haojie Wang,
Haojie Wang
Tsinghua University, Beijing, China
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Xipeng Lin,
Xipeng Lin
Tsinghua University, Beijing, China
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David M. Christopher
David M. Christopher
Tsinghua University, Beijing, China
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Haojie Wang
Tsinghua University, Beijing, China
Xipeng Lin
Tsinghua University, Beijing, China
David M. Christopher
Tsinghua University, Beijing, China
Paper No:
AJTEC2011-44336, T10231; 9 pages
Published Online:
March 1, 2011
Citation
Wang, H, Lin, X, & Christopher, DM. "Nucleate Boiling Bubble Dynamics in a PDMS Microchannel With a Single Nucleation Site." Proceedings of the ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASME/JSME 2011 8th Thermal Engineering Joint Conference. Honolulu, Hawaii, USA. March 13–17, 2011. T10231. ASME. https://doi.org/10.1115/AJTEC2011-44336
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