Simulation of the Convective Heat Transfer in a Nanofluid Composed of Water and FMWNT Carbon Nanotubes in a Microchannel Subjected to a Magnetic Field in the Slip Flow Regime

Authors

M.Sc. Student, Department of Mechanical Engineering, Faculty of Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Isfahan, Iran.

Abstract

The forced convective heat transfer of a nanofluid composed of water and FMWNT nano-particles in a two-dimensional microchannel was numerically investigated. The bottom wall of the microchannel was fully insulated. The upper wall was insulated only at the entrance, the rest of the upper wall was subjected to a constant heat flux. A constant magnetic field with a strength of B0 was also applied on it. The slip velocity boundary condition was considered along the walls of the microchannel. Navier-Stokes equations were discretized and then solved numerically using a computer code. Results were presented in the form of velocity profiles, temperature, and the Nusselt number. In the present work, the effect of magnetic field on the slip velocity of the fluid adjacent to the microchannel wall was studied for the first time. The use of a nanofluid composed of water and carbon nanotubes (FMWNT), as the working fluid in a microchannel, could be another novelty of the present study. It was seen that stronger magnetic field corresponded to more amount of slip velocity.

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References

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Journal of Solid and Fluid Mechanics
Volume 5, Issue 3 - Serial Number 3
September and October 2015
Pages 209-222

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