An investigation is made on the effect of Hall currents on thermal instability of a compressible couple-stress fluid in the presence of a horizontal magnetic field saturated in a porous medium. The analysis is carried out within the framework of the linear stability theory and normal mode technique. A dispersion relation governing the effects of viscoelasticity, Hall currents, compressibility, magnetic field and porous medium is derived. ; For the stationary convection a couple-stress fluid behaves like an ordinary Newtonian fluid due to the vanishing of the viscoelastic parameter. Compressibility, the magnetic filed and couple-stress parameter have stabilizing effects on the system whereas Hall currents and medium permeability have a destabilizing effect on the system, but in the absence of Hall current couple-stress has a destabilizing effect on the system. It has been observed that oscillatory modes are introduced due to the presence of viscoelasticity, magnetic field porous medium and Hall currents which were non- existent in their absence.
Zielona Góra: Uniwersytet Zielonogórski
IJAME, volume 21, number 1 (2016)
Biblioteka Uniwersytetu Zielonogórskiego
Jul 6, 2023
Apr 6, 2023
54
https://zbc.uz.zgora.pl/repozytorium/publication/80426
Edition name | Date |
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Thermal convection of magneto compressible couple-stress fluid saturated in a porous medium with hall current | Jul 6, 2023 |
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