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

Man Lee; Yi Kuen Lee; Yitshak Zohar

doi:10.1109/NEMS.2007.352067

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

Man Lee^*
, Yi Kuen Lee
, Yitshak Zohar

^*Corresponding author for this work

Department of Mechanical and Aerospace Engineering

Research output: Chapter in Book/Conference Proceeding/Report › Conference Paper published in a book › peer-review

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 language	English
Title of host publication	Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007
Pages	502-506
Number of pages	5
DOIs	https://doi.org/10.1109/NEMS.2007.352067
Publication status	Published - 2007
Event	2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007 - Bangkok, Thailand Duration: 16 Jan 2007 → 19 Jan 2007

Publication series

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

Conference

Conference	2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007
Country/Territory	Thailand
City	Bangkok
Period	16/01/07 → 19/01/07

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Keywords

Forced convection
Microchannel
Nusselt number
Single-phase liquid flow

Access to Document

10.1109/NEMS.2007.352067

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). Article 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

Lee, Man ; Lee, Yi Kuen ; Zohar, Yitshak. / The nusselt number in single-phase liquid flow forced convection in microchannels. Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007. 2007. pp. 502-506 (Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007).

@inproceedings{2eb77571b04b40758700535198cf13ea,

title = "The nusselt number in single-phase liquid flow forced convection in microchannels",

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.",

keywords = "Forced convection, Microchannel, Nusselt number, Single-phase liquid flow",

author = "Man Lee and Lee, \{Yi Kuen\} and Yitshak Zohar",

year = "2007",

doi = "10.1109/NEMS.2007.352067",

language = "English",

isbn = "1424406102",

series = "Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007",

pages = "502--506",

booktitle = "Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007",

note = "2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007 ; Conference date: 16-01-2007 Through 19-01-2007",

}

Lee, M, Lee, YK & 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., 4160370, Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007, pp. 502-506, 2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007, Bangkok, Thailand, 16/01/07. https://doi.org/10.1109/NEMS.2007.352067

The nusselt number in single-phase liquid flow forced convection in microchannels. / Lee, Man; Lee, Yi Kuen; Zohar, Yitshak.
Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007. 2007. p. 502-506 4160370 (Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007).

Research output: Chapter in Book/Conference Proceeding/Report › Conference Paper published in a book › peer-review

TY - GEN

T1 - The nusselt number in single-phase liquid flow forced convection in microchannels

AU - Lee, Man

AU - Lee, Yi Kuen

AU - Zohar, Yitshak

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

KW - Forced convection

KW - Microchannel

KW - Nusselt number

KW - Single-phase liquid flow

UR - https://openalex.org/W2085272536

U2 - 10.1109/NEMS.2007.352067

DO - 10.1109/NEMS.2007.352067

M3 - Conference Paper published in a book

SN - 1424406102

SN - 9781424406104

T3 - Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007

SP - 502

EP - 506

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

T2 - 2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007

Y2 - 16 January 2007 through 19 January 2007

ER -

Lee M, Lee YK, Zohar Y. 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. 2007. p. 502-506. 4160370. (Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007). doi: 10.1109/NEMS.2007.352067

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

Abstract

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UN SDGs

Keywords

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