Role of Surface Texturing on Heat Transfer Coefficient Enhancement in Spray Impingement Cooling

Sankar Muthukrishnan; Vinod Srinivasan

doi:10.1109/ITherm45881.2020.9190526

Role of Surface Texturing on Heat Transfer Coefficient Enhancement in Spray Impingement Cooling

Sankar Muthukrishnan, Vinod Srinivasan

Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

The role of micro-scale surface roughness on wetting characteristics and heat transfer performance were studied by conducting spray cooling experiments using deionized water. Microtextured surfaces were fabricated using standard lithography technique and etching process. Experimental results obtained reveal a 100% increment in the CHF for micro-textured surfaces with pin fin diameter of 5 microns. Heat transfer coefficients in the two-phase regime were calculated by subtracting the sensible heat from the total heat flux. Surfaces with bigger pillar size and larger spacing (~50 microns) exhibits greater heat transfer coefficient values due to availability of additional floor area for evaporation. Effect of liquid/air flow rates were also studied. Results show improved heat transfer performance for higher liquid flow rates; however, the lowest liquid flow rate tested (30 ml/min) showcased highest values of heat transfer coefficients obtained, indicating the capability of surface to form very thin liquid films at an optimum value of liquid and air flow rates.

Original language	English (US)
Title of host publication	Proceedings of the 19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020
Publisher	IEEE Computer Society
Pages	900-904
Number of pages	5
ISBN (Electronic)	9781728197647
DOIs	https://doi.org/10.1109/ITherm45881.2020.9190526
State	Published - Jul 2020
Event	19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020 - Virtual, Orlando, United States Duration: Jul 21 2020 → Jul 23 2020

Publication series

Name	InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM
Volume	2020-July
ISSN (Print)	1936-3958

Conference

Conference	19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020
Country/Territory	United States
City	Virtual, Orlando
Period	7/21/20 → 7/23/20

Bibliographical note

Funding Information:
Portions of this work were conducted in the Minnesota Nano Center, which is supported by the National Science Foundation through the National Nano Coordinated Infrastructure Network (NNCI) under Award Number ECCS-1542202.

Publisher Copyright:
© 2020 IEEE.

Keywords

capillary suction
electronics cooling
liquid spray
thin-film evaporation
three-phase contact-line
viscous drag

Publisher link

10.1109/ITherm45881.2020.9190526

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Muthukrishnan, S., & Srinivasan, V. (2020). Role of Surface Texturing on Heat Transfer Coefficient Enhancement in Spray Impingement Cooling. In Proceedings of the 19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020 (pp. 900-904). Article 9190526 (InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM; Vol. 2020-July). IEEE Computer Society. https://doi.org/10.1109/ITherm45881.2020.9190526

Role of Surface Texturing on Heat Transfer Coefficient Enhancement in Spray Impingement Cooling. / Muthukrishnan, Sankar; Srinivasan, Vinod.
Proceedings of the 19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020. IEEE Computer Society, 2020. p. 900-904 9190526 (InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM; Vol. 2020-July).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Muthukrishnan, S & Srinivasan, V 2020, Role of Surface Texturing on Heat Transfer Coefficient Enhancement in Spray Impingement Cooling. in Proceedings of the 19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020., 9190526, InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM, vol. 2020-July, IEEE Computer Society, pp. 900-904, 19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020, Virtual, Orlando, United States, 7/21/20. https://doi.org/10.1109/ITherm45881.2020.9190526

Muthukrishnan S, Srinivasan V. Role of Surface Texturing on Heat Transfer Coefficient Enhancement in Spray Impingement Cooling. In Proceedings of the 19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020. IEEE Computer Society. 2020. p. 900-904. 9190526. (InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM). doi: 10.1109/ITherm45881.2020.9190526

Muthukrishnan, Sankar ; Srinivasan, Vinod. / Role of Surface Texturing on Heat Transfer Coefficient Enhancement in Spray Impingement Cooling. Proceedings of the 19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020. IEEE Computer Society, 2020. pp. 900-904 (InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM).

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abstract = "The role of micro-scale surface roughness on wetting characteristics and heat transfer performance were studied by conducting spray cooling experiments using deionized water. Microtextured surfaces were fabricated using standard lithography technique and etching process. Experimental results obtained reveal a 100% increment in the CHF for micro-textured surfaces with pin fin diameter of 5 microns. Heat transfer coefficients in the two-phase regime were calculated by subtracting the sensible heat from the total heat flux. Surfaces with bigger pillar size and larger spacing (~50 microns) exhibits greater heat transfer coefficient values due to availability of additional floor area for evaporation. Effect of liquid/air flow rates were also studied. Results show improved heat transfer performance for higher liquid flow rates; however, the lowest liquid flow rate tested (30 ml/min) showcased highest values of heat transfer coefficients obtained, indicating the capability of surface to form very thin liquid films at an optimum value of liquid and air flow rates. ",

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AB - The role of micro-scale surface roughness on wetting characteristics and heat transfer performance were studied by conducting spray cooling experiments using deionized water. Microtextured surfaces were fabricated using standard lithography technique and etching process. Experimental results obtained reveal a 100% increment in the CHF for micro-textured surfaces with pin fin diameter of 5 microns. Heat transfer coefficients in the two-phase regime were calculated by subtracting the sensible heat from the total heat flux. Surfaces with bigger pillar size and larger spacing (~50 microns) exhibits greater heat transfer coefficient values due to availability of additional floor area for evaporation. Effect of liquid/air flow rates were also studied. Results show improved heat transfer performance for higher liquid flow rates; however, the lowest liquid flow rate tested (30 ml/min) showcased highest values of heat transfer coefficients obtained, indicating the capability of surface to form very thin liquid films at an optimum value of liquid and air flow rates.

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KW - thin-film evaporation

KW - three-phase contact-line

KW - viscous drag

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Role of Surface Texturing on Heat Transfer Coefficient Enhancement in Spray Impingement Cooling

Abstract

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