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Analysis Of Heat Transfer And Fluid Flow In Novel Branched Wavy Microchannel Using Nanofluid

Shanti Lata Das
IIT (ISM) Dhanbad, Jharkhand, India

Pawan K. Singh
Department of Mechanical Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Jharkhand-826004, India

Nitish Sagar
IIT (ISM) Dhanbad, Jharkhand, India

Dilip Singh Naruka
Department of Mechanical Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Jharkhand-826004, India

DOI: 10.1615/IHMTC-2017.2150
pages 1551-1557

摘要

Thermal management has become a critical requirement as most of product failure is due to heat-related issues. So for better heat dissipation in devices, heat sinks are incorporated. A heat sink is a passive heat exchanger that transfers the heat generated by the device to fluid medium. There are different ways of improving heat dissipation such as incorporation of micro-channel in heat sink or nanofluid or both micro-channel along with nanofluid. Laminar nanofluid flow and heat transfer behavior in three-dimensional novel single wavy micro-channel using nanofluid (Al2O3-water) has been numerically investigated using both single and discrete phase modeling. The Reynolds number and nanoparticle volume fraction considered are in the ranges of 50−200 and 0−4% respectively. Numerical solutions are obtained by solving the governing equation of continuity, momentum and energy using the finite volume method. The effects of nanoparticle volume fraction and the Reynolds number on the pressure drop, local and average Nusselt number and the heat transfer enhancement are presented and discussed. The effect of Dean's vortices induced by wavy channel design on enhancement of convective heat transfer and fluid flow has been studied. The numerical results suggest that heat transfer performance has been augmented positively at the same time pressure drop penalty incurred.

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