This paper presents solutions to heat transfer problems that occur in flow micro-channels driven by the combined effect of electroosmosis and a pressure gradient. Fully developed velocity profiles are considered, and the thermal developing region is analyzed. The solution methodology is based on the Generalized Integral Transform Technique, which leads to fully analytical solution for all presented cases. With the solution of the temperature fields, the behavior of the Nusselt number is investigated for different test-cases. The effects of the flow driving mechanisms, viscous dissipation and Joule heating, as well as axial diffusion are analyzed. The approximated solution with thin Electric Double Layers (EDL) is considered, but cases without this restriction are also analyzed. The cases including axial heat conduction are analyzed for a simplified case of purely electroosmotic-driven flow with a thin-EDL, which leads to a simple analytical solution.
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ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 Fluids Engineering Division Summer Meeting
July 8–12, 2012
Rio Grande, Puerto Rico, USA
Conference Sponsors:
- Heat Transfer Division
- Fluids Engineering Division
ISBN:
978-0-7918-4479-3
PROCEEDINGS PAPER
Analytical and Hybrid Solutions for Heat Transfer in Combined Electroosmotic and Pressure-Driven Flows
L. A. Sphaier
L. A. Sphaier
Universidade Federal Fluminense, Niterói, RJ, Brazil
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L. A. Sphaier
Universidade Federal Fluminense, Niterói, RJ, Brazil
Paper No:
ICNMM2012-73185, pp. 317-326; 10 pages
Published Online:
July 22, 2013
Citation
Sphaier, LA. "Analytical and Hybrid Solutions for Heat Transfer in Combined Electroosmotic and Pressure-Driven Flows." Proceedings of the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 Fluids Engineering Division Summer Meeting. ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 317-326. ASME. https://doi.org/10.1115/ICNMM2012-73185
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