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Cu-H2O Nano-Fluid Effect on Buoyancy Driven Flow in 2D Enclosure

Siddhartha Kosti

Abstract


System miniaturization resulting in exponential increase of the heat in electronic devices, to serve this purpose we need some adequate quality heat cooling devices and materials, due to the limitation of conventional cooling process. Suspension of nano-particles in the base fluid called nano-fluid, shows prominent increase in the heat transfer and can be one of appropriate option which can be answer to this problem. Present work deals with numerical simulation of Cu-H2O nanofluid in an enclosure subjected to constant heat flux at one side while other sides are open to atmosphere and thus lose heat to the atmosphere. The nanofluid is completely confined within the enclosure and flows due to natural convection alone. Problem is governed by conservation of mass, momentum and energy and is solved by stream-vorticity approach. ThreeRayleigh number is considered in the present study to study the effect of it contours and velocity profiles. Addition of nano-fluid is not showing any relevant changes in the flow pattern. An egg shape central roll is forming for all the concentration values and the roll is on opposite side of the heat flux wall. For low Rayleigh number (1×105), viscosity model is sensitive while for high Rayleigh number (3×105) thermal conductivity model is more sensitive to that of viscosity model.

Keywords: Heat flux, natural convection, Cu-H2O nano-fluid, Rayleigh number

Cite this Article

Siddhartha Kosti. Cu-H2O Nano-Fluid Effect on Buoyancy Driven Flow in 2D Enclosure. Journal of Thermal Engineering and Applications. 2017; 4(2): 1–7p.



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