Impact of ribs on flow parameters and laminar heat transfer of water–aluminum oxide nanofluid with different nanoparticle volume fractions in a three-dimensional rectangular microchannel

By Omid Ali Akbari, Davood Toghraie, Arash Karimipour. 2015

143 citations recorded by the source corpus.

This article aims to study the impact of ribs on flow parameters and laminar heat transfer of water–aluminum oxide nanofluid with different nanoparticle volume fractions in a three-dimensional rectangular microchannel. To this aim, compulsory convection heat transfer of water–aluminum oxide nanofluid in a rib-roughened microchannel has been numerically studied. The results of this simulation for rib-roughened three-dimensional microchannel have been evaluated in contrast to the smooth (unribbed) three-dimensional microchannel with identical geometrical and heat–fluid boundary conditions. Numerical simulation is performed for different nanoparticle volume fractions for Reynolds numbers of 10 and 100. Cold fluid entering the microchannel is heated in order to apply constant flux to external surface of the microchannel walls and then leaves it. Given the results, the fluid has a higher heat transfer with a hot wall in surfaces with ribs rather than in smooth ones. As Reynolds number, number of ribs, and nanoparticle volume fractions increase, more temperature increase happens in fluid in exit intersection of the microchannel. By investigating Nusselt number and friction factor, it is observed that increase in nanoparticle volume fractions causes nanofluid heat transfer properties to have a higher heat transfer and friction factor compared to the base fluid used in cooling due to an increase in viscosity.

Subfields: Biomedical Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/7e17321093e278c3787772bb31017379257d0ba1

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Citations in the corpus

The study of heat transfer and laminar flow of kerosene/multi-walled carbon nanotubes (MWCNTs) nanofluid in the microchannel heat sink with slip boundary condition (2018, methodology): “In this study, in order to enhance the solving accuracy, to couple velocity and pressure, SIMPLEC algorithm [46, 47] has been used, and the maximum loss for results convergence of this simulation has been chosen 10 [48–50].”
The effect of attack angle of triangular ribs on heat transfer of nanofluids in a microchannel (2018, methodology): “[12] numerically investigated the effects of ribs on flow and laminar heat transfer parameters of water/Al2O3 nanofluid with different volume fractions of nanoparticles in a three-dimensional rectangular microchannel.”
The effect of velocity and dimension of solid nanoparticles on heat transfer in non-Newtonian nanofluid (2017, methodology): “The following are used to calculate the density of the nanofluid [29,30] and the special thermal capacity [31]:”