Thermal Instability of a Walters' (Model B0) Elastico-Viscous Fluid in the Presence of Variable Gravity Field and Rotation in Porous Medium

2001 ◽  
Vol 26 (1) ◽  
Author(s):  
Veena Sharma ◽  
Gian Chand Rana
Keyword(s):  
Porous Medium ◽  
Viscous Fluid ◽  
Gravity Field ◽  
Thermal Instability ◽  
Variable Gravity

scholarly journals Thermal Instability of a Couple-Stress Ferromagnetic Fluid in the Presence of Variable Gravity Field and Horizontal Magnetic Field with Hall Currents Saturating in a Porous Medium

2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Sudhir Kumar Pundir ◽  
◽  
Pulkit Kumar Nadian ◽  
Rimple Pundir ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Porous Medium ◽  
Gravity Field ◽  
Couple Stress ◽  
Thermal Instability ◽  
Horizontal Magnetic Field ◽  
Variable Gravity ◽  
Ferromagnetic Fluid

https://jusst.org/thermal-instability-of-a-couple-stress-ferromagnetic-fluid-in-the-presence-of-variable-gravity-field-and-horizontal-magnetic-field-with-hall-currents-saturating-in-a-porous-medium/

Gravity Modulation of Thermal Instability in a Viscoelastic Fluid Saturated Anisotropic Porous Medium

2012 ◽  
Vol 67 (1-2) ◽  
pp. 1-9 ◽  
Author(s):  
Beer S. Bhadauria ◽  
Atul K. Srivastava ◽  
Nirmal C. Sacheti ◽  
Pallath Chandran
Keyword(s):  
Porous Medium ◽  
Gravity Field ◽  
Viscoelastic Fluid ◽  
Thermal Instability ◽  
Time Dependent ◽  
Periodic Part ◽  
Gravity Modulation ◽  
Dependent Part ◽  
Anisotropic Porous Medium ◽  
The Stability

The present paper deals with a thermal instability problem in a viscoelastic fluid saturating an anisotropic porous medium under gravity modulation. To find the gravity modulation effect, the gravity field is considered in two parts: a constant part and an externally imposed time-dependent periodic part. The time-dependent part of the gravity field, which can be realized by shaking the fluid, has been represented by a sinusoidal function. Using Hill’s equation and the Floquet theory, the convective threshold has been obtained. It is found that gravity modulation can significantly affect the stability limits of the system. Further, we find that there is a competition between the synchronous and subharmonic modes of convection at the onset of instability. Effects of various parameters on the onset of instability have also been discussed.

scholarly journals Effect of variable gravity on thermal instability of rotating nanofluid in porous medium

2015 ◽  
Vol 43 (1) ◽  
pp. 62-69 ◽  
Author(s):  
Ramesh Chand ◽  
G.C. Rana ◽  
S.K. Kango
Keyword(s):  
Porous Medium ◽  
Thermal Instability ◽  
Variable Gravity
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