Magneto Binary Nanofluid Convection in Porous Medium

The effect of an externally impressed magnetic field on the stability of a binary nanofluid layer in porous medium is considered in this work. The conservation equations related to the system are solved using normal mode technique and Galerkin method to analyze the problem. The complex expressions a...

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Bibliographic Details
Published in:International Journal of Chemical Engineering 2016-01, Vol.2016 (2016), p.1-8
Main Authors: Sharma, Jyoti, Wanchoo, R. K., Gupta, Urvashi
Format: Article
Language:English
Subjects:
Copper
Enhanced oil recovery
Fluid dynamics
Fluid flow
Fluids
Heat conductivity
Magnetic fields
Nanoparticles
Nanostructure
Partial differential equations
Porous media
Rayleigh number
Studies
Titanium dioxide
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Summary:The effect of an externally impressed magnetic field on the stability of a binary nanofluid layer in porous medium is considered in this work. The conservation equations related to the system are solved using normal mode technique and Galerkin method to analyze the problem. The complex expressions are approximated to get useful results. Mode of heat transfer is stationary for top heavy distribution of nanoparticles in the fluid layer and top heavy nanofluids are very less stable than regular fluids. Oscillatory motions are possible for bottom heavy distribution of nanoparticles and they are not much influenced by properties of different nanoparticles. A comparative analysis of the instability of water based nanofluids with metallic (Cu, Ag) and semiconducting (TiO2, SiO2) nanoparticles under the influence of magnetic field is examined. Semiconducting nanofluids are found to be more stable than metallic nanofluids. Porosity destabilizes the layer while solute difference (at the boundaries of the layer) stabilizes it. Magnetic field stabilizes the fluid layer system significantly.
ISSN:1687-806X
1687-8078
DOI:10.1155/2016/9424036