The nusselt number in single-phase liquid flow forced convection in microchannels

Man Lee, Yi Kuen Lee, Yitshak Zohar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A thermal microsystem, integrated with pressure and temperature microsensors, is fabricated to study single-phase liquid flow forced convection under uniform heat flux boundary condition. Standard micromachining techniques were utilized in the fabrication of the integrated microsystem. Utilizing a waferbond-and-etch-back technology, the heat source, temperature and pressure sensors are separated from the fluid flow by a 1.5μm thick composite membrane; thus, allowing experimentally good control of the thermal boundary conditions. A threedimensional numerical simulation model has been constructed to investigate the heat flux distribution. The results show that upstream the cold working fluid absorbs heat, while downstream the warmer working fluid releases heat. The Nusselt number is calculated based on the computations, which are compared with analytical and experimental results. The wall Nusselt number in a microchannel can only be estimated by conventional analytical solution in a limited Reynolds number range. The estimated Nusselt number for forced convection is found to be highly dependent on the location of the temperature measurements.

Original languageEnglish (US)
Title of host publicationProceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007
Pages502-506
Number of pages5
DOIs
StatePublished - Aug 28 2007
Event2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007 - Bangkok, Thailand
Duration: Jan 16 2007Jan 19 2007

Publication series

NameProceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007

Other

Other2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007
CountryThailand
CityBangkok
Period1/16/071/19/07

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Keywords

  • Forced convection
  • Microchannel
  • Nusselt number
  • Single-phase liquid flow

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Electrical and Electronic Engineering

Cite this

Lee, M., Lee, Y. K., & Zohar, Y. (2007). The nusselt number in single-phase liquid flow forced convection in microchannels. In Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007 (pp. 502-506). [4160370] (Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007). https://doi.org/10.1109/NEMS.2007.352067