Numerical Analysis on Heat Transfer Enhancement and Wall Shear Stress of an Alumina Nanofluid for Different Forced Convection Flows


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Abstract


The present study aims to identify effects due to convection heat transfer in a microtube enclosure. Different Reynolds numbers for different types of convection flow of a water-Al2O3 nanofluid in a circular tube subjected to a constant wall temperature was numerically analyzed. The single-phase model was employed to simulate the nanofluid convection, taking into account constant thermophysical properties. Simulations have been carried out for the volumetric fraction of alumina nanoparticles, = 0–4%. It is found that heat transfer flux for nanofluids is greater than that of the base liquid. Heat transfer enhancement is increasing with the particle volume concentration and Reynolds number. A study on wall shear stress was attempted, too.
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Keywords


Numerical; Alumina Nanofluids; Heat Transfer; Wall Shear

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