Thermal transport and performance analysis of pressure- and electroosmotically-driven liquid flow microchannel heat sink with wavy wall

Afzal Husain, Kwang Yong Kim*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The present study investigates the microchannel heat sinks (MCHSs) with smooth and wavy wall for pure electroosmotic flow (EOF), pressure-driven flow (PDF) and combined electroosmotic and pressure-driven flow (PDF + EOF). A three-dimensional numerical analysis was performed for EOF, PDF and combined flow (PDF + EOF) through finite volume analysis. The EOF was combined with the PDF to enhance the flow rate and to reduce the thermal resistance of the MCHS. The effect of wall waviness on electroosmosis and thermal performance of the MCHS was critically investigated for flow rate, friction factor, Nusselt number, thermal resistance and pumping power. The design variables related to the wavelength and amplitude and width of microchannel were investigated for their effect on the overall thermal performance and pumping power. The electroosmosis not only increases the flow rate but also suppresses the secondary flow developed due to the topology of the microchannel walls. The non-uniformity of the velocity and temperature is reduced due to the application of the EOF in a PDF and combined flow (PDF + EOF).

Original languageEnglish
Pages (from-to)93-105
Number of pages13
JournalHeat and Mass Transfer/Waerme- und Stoffuebertragung
Volume47
Issue number1
DOIs
Publication statusPublished - Jan 2011

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

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