Investigation of the effect of Brownian motion on the flow characteristics in natural convection using different nanofluids

Etaig, Saleh, Hasan, Reaz, Perera, Noel and Ramadan, Ahmed (2017) Investigation of the effect of Brownian motion on the flow characteristics in natural convection using different nanofluids. In: CHT-17 - ICHMT International Symposium on Advances in Computational Heat Transfer, 28th May - 1st June 2017, Napoli, Italy.

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This paper reports the effect of the Brownian motion on the fluid flow and heat transfer performance using various nanofluids in a natural convection in square enclosure. The energy equation and Navier-Stokes equation are solved numerically using finite volume approach. The effect of the Brownian motion was employed based on thermal conductivity model with Brownian motion effect. The effect of volume concentration on the enhancement of heat transfer has been studied incorporating the Brownian motion; the influence of effective thermal conductivity on the enhancement was also investigated for a range of volume fraction concentration. Various volume concentrations were tested in the present study; 2%, 3%, 4% and 6%. Different Raleigh numbers were investigated for different nanoparticles. The results revealed that the increase in the volume fraction deteriorates the heat transfer. The velocity gradients were also found to be affected by the volume fractions. The temperature profile for different Rayleigh number is presented. Three different nanofluids Cu-Water, TiO-water and AL2O3-water were studied.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Heat Transfer, CFD, Natural convection, Brownian motion
Subjects: F200 Materials Science
H100 General Engineering
H300 Mechanical Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
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Depositing User: Noel Perera
Date Deposited: 17 Jul 2017 15:20
Last Modified: 14 Nov 2017 03:46

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