Simulations with a Thermodynamically Consistent Model for Convective Transport in Nanofluids
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Abstract A non-homogeneous model is used to simulate convective transport in nanofluids. The model is a thermodynamically consistent version of the celebrated Buongiorno model. We study two situations in detail: flow through a pipe that is heated periodically in time at one lateral wall and a~lid driven cavity with a triangular heat source placed within. Both studies reveal the mechanisms of enhanced heat transfer by nanofluids through thermophoresis: the temperature gradient at the wall leads to a reduced concentration of nanoparticles. This reduces the concentration dependent viscosity of the suspension close to the boundary, which in turn leads to a stronger convective transport.
2003 ◽
Vol 46
(22)
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pp. 4169-4177
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2015 ◽
Vol 46
(7)
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pp. 643-656
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