TY - JOUR
T1 - Thermal transport and performance analysis of pressure- and electroosmotically-driven liquid flow microchannel heat sink with wavy wall
AU - Husain, Afzal
AU - Kim, Kwang Yong
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF), grant No. 20090083510, funded by the Korean government (MEST) through Multi-phenomena CFD Engineering Research Center .
PY - 2011/1
Y1 - 2011/1
N2 - 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).
AB - 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).
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U2 - 10.1007/s00231-010-0675-6
DO - 10.1007/s00231-010-0675-6
M3 - Article
AN - SCOPUS:79951949577
SN - 0947-7411
VL - 47
SP - 93
EP - 105
JO - Heat and Mass Transfer/Waerme- und Stoffuebertragung
JF - Heat and Mass Transfer/Waerme- und Stoffuebertragung
IS - 1
ER -