Magnetohydrodynamics flow and heat transfer of Cu-water nanofluid through a partially porous wavy channel

摘要

Highlights•Effect of magnetic field on thermo-hydrodynamics of Cu-Water nanofluid is investigated.•The nanofluid is flowing in a partially porous channel with a wavy wall.•The Lattice Boltzmann methods is applied as a numerical technique.•By increasing the volume fraction of Cu nanoparticle, pressure gradient andDanumber, the rate of heat transfer increases.•By applying strong magnetic field, the effect of porous layer is vanished.AbstractIn this paper, the lattice Boltzmann method is applied to investigate the effects of uniform vertical magnetic field on thermo-hydrodynamics of nanofluid in a partially porous channel. Cu-water nanofluid with constant pressure gradient is forced to flow into the channel while the top wall is heated by constant heat flux and bottom wavy wall of the channel is insulated against heat. The porous media is modeled using the Brinkman–Forchheimer model. Good agreements with the previous results verify that the selected numerical method is a capable method for simulating magnetic fluids in a porous media. The effects of active parameters, i.e. solid volume fraction of nanoparticles, pressure gradient, magnetic field and permeability of the porous layer, on thermo-hydrodynamics of flow are examined. The results reveal that the Nusselt number is an increasing function of nanoparticle volume fraction, Hartmann number, pressure gradient and Darcy number, although the effect of Darcy numbers and pressure gradient on the temperature profile are more noticeable than others.