Thermal Instability in a Layer of Couple Stress Nanofluid Saturated Porous Medium
2017 ◽
Vol 47
(1)
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pp. 69-84
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Keyword(s):
Abstract Thermal instability in a horizontal layer of Couple-stress nanofluid in a porous medium is investigated. Darcy model is used for porous medium. The model used for nanofluid incorporates the effect of Brownian diffusion and thermophoresis. The flux of volume fraction of nanoparticle is taken to be zero on the isothermal boundaries. Normal mode analysis and perturbation method is employed to solve the eigenvalue problem with the Rayleigh number as eigenvalue. Oscillatory convection cannot occur for the problem. The effects of Couple-stress parameter, Lewis number, modified diffusivity ratio, concentration Rayleigh number and porosity on stationary convection are shown both analytically and graphically.
2018 ◽
Vol 29
(10)
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pp. 1850097
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2011 ◽
Vol 7
(1)
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pp. 29-43
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2013 ◽
Vol 18
(3)
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pp. 871-886
2018 ◽
Vol 62
(3)
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pp. 233-240
2020 ◽
Vol 76
(2)
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pp. 75-84