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3 International Journal of Applied Mechanics and Engineering

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Triple diffusive convection of a non-Newtonian fluid under the combined effect of compressibility and variable gravity

Aggarwal A. K., Dixit D.

International Journal of Applied Mechanics and Engineering

2019

Vol. 24, no. 4

1--11

In this paper, triple diffusive convection in a Rivlin-Ericksen fluid layer, which is permeated with suspended particles in the porous medium under the effect of compressibility and variable gravity, is investigated. Linear stability theory and normal mode analysis have been used to study the problem under consideration. It is observed that, for stationary convection, suspended particles, compressibility and medium permeability have destabilizing/stabilizing effects under certain conditions. The variable gravity parameter destabilizes the system whereas stable solute gradients have a stabilizing effect.

Variable gravity effects on thermal instability of nanofluid in anisotropic porous medium

Chand R., Rana G. C., Kumar S.

International Journal of Applied Mechanics and Engineering

2013

Vol. 18, no. 3

631--642

In this paper, we study the effects of variable gravity on thermal instability in a horizontal layer of a nanofluid in an anisotropic porous medium. Darcy model been used for the porous medium. Also, it incorporates the effect of Brownian motion along with thermophoresis. The normal mode technique is used to find the confinement between two free boundaries. The expression of the Rayleigh number has been derived, and the effects of variable gravity and anisotropic parameters on the Rayleigh number have been presented graphically.

Thermosolutal instability of Walters' (model B') visco-elastic rotating fluid permeated with suspended particles and variable gravity field in porous medium

Sharma V., Rana G. C.

International Journal of Applied Mechanics and Engineering

2001

Vol. 6, no 4

843-860

The thermosolutal instability of Walters' (model B') elastico-viscous rotating fluid in a porous medium is considered in the presence of a uniform rotation, suspended particles and variable gravity field. the stable solute gradient, rotation, gravity field, suspended particles and viscoelasticity introduce oscillatory modes. For the stationary convection, the stable gradient and rotation have stabilizing effects and suspended particles are found to have destabilizing effect on the system, whereas the medium permeability has destabilizing or stabilizing efect on the system under certain conditions. The effects of stable solute gradient, rotation, suspended particles, medium permeability have also been shown graphically.