Numerical Modeling of Fluid Flow and Thermal Transport in Gravity - Dominated 3D Microchannels

Odesola, Isaac F. and Ashaju, Abimbola and Ige, Ebenezer O. Numerical Modeling of Fluid Flow and Thermal Transport in Gravity - Dominated 3D Microchannels. researchgate.

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Abstract

The success recorded by the usage of microchannel in high flux cooling application, has led to several studies aimed at advancement in microchannel fluid flow and heat transfer technology. A recent study area with promising breakthrough is the effects of g ravity on microscale flow. Numerical simulations were conducted to study single phase flow and heat transfer in 3D microchannels. A priori, the 3D models were validated with experimental results and showed agreement. Two different aspects were simulated: f irstly a microchannel with hydraulic diameter of Dh =199 휇푚 for gravity effects on heat transfer. Secondly, gravity effects on friction factor with hydraulic diameter Dh = 1587 휇푚 . The 3D model confirmed the existence of gravity effects and scaled with significant factors previous 2D model predictions. This result realistically presents the potential of microchannel angular orientation as a passive tool for flow optimization and heat enhancement in portable electronics devices and compact - sized biomedic al devices .

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