Effects of protrusions on heat transfer in a microtube and in a two-dimensional microchannel of finite wall thickness were investigated for various shapes and sizes of the protrusion. Calculations were done for incompressible flow of a Newtonian fluid with developing momentum and thermal boundary layers under uniform and discrete heating conditions. It was found that the local Nusselt number near the protrusions changes significantly with the variations of Reynolds number, height, width, and distance between protrusions, and the distribution of discrete heat sources. The results presented in the paper demonstrate that protrusions can be used advantageously for the enhancement of local heat transfer whereas the global performance may be enhanced or diminished based on the tube geometry.
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2010 14th International Heat Transfer Conference
August 8–13, 2010
Washington, DC, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4941-5
PROCEEDINGS PAPER
Effects of Protrusions on Conjugate Heat Transfer in a Microtube or Microchannel
Muhammad M. Rahman,
Muhammad M. Rahman
University of South Florida, Tampa, FL
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Phaninder Injeti
Phaninder Injeti
University of South Florida, Tampa, FL
Search for other works by this author on:
Muhammad M. Rahman
University of South Florida, Tampa, FL
Phaninder Injeti
University of South Florida, Tampa, FL
Paper No:
IHTC14-23319, pp. 273-282; 10 pages
Published Online:
March 1, 2011
Citation
Rahman, MM, & Injeti, P. "Effects of Protrusions on Conjugate Heat Transfer in a Microtube or Microchannel." Proceedings of the 2010 14th International Heat Transfer Conference. 2010 14th International Heat Transfer Conference, Volume 6. Washington, DC, USA. August 8–13, 2010. pp. 273-282. ASME. https://doi.org/10.1115/IHTC14-23319
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