Convective instability in binary nanofluids with an internal heat source in the presence of thermodiffusion and nanoparticles

Heat Transfer ◽  
2020 ◽  
Vol 49 (8) ◽  
pp. 4511-4527
Author(s):  
Sravan Nayek Gaikwad ◽  
Dnyaneshwar Madhav Surwase
Keyword(s):  
Heat Source ◽  
Convective Instability ◽  
Internal Heat ◽  
Internal Heat Source

Effect of a Variable Gravity Field on Convection in an Anisotropic Porous Medium With Internal Heat Source and Inclined Temperature Gradient

2001 ◽  
Vol 124 (1) ◽  
pp. 144-150 ◽  
Author(s):  
Sherin M. Alex ◽  
Prabhamani R. Patil
Keyword(s):  
Temperature Gradient ◽  
Heat Source ◽  
Gravity Field ◽  
Convective Instability ◽  
Opposite Effect ◽  
Internal Heat ◽  
Internal Heat Source ◽  
Anisotropic Porous Medium ◽  
Variable Gravity ◽  
Inclined Temperature Gradient

The convective instability of a horizontal fluid-saturated anisotropic porous layer, with internal heat source and inclined temperature gradient, subject to a gravity field varying with distance in the layer, is investigated. A linear stability analysis is performed and the resulting eigenvalue problem solved using a Galerkin technique. In the absence of an inclined temperature gradient, an increase in the variable gravity parameter above −1 destabilizes the system. In its presence interesting developments occur. An increase in the heat generation destabilizes the system when the variable gravity parameter is nonnegative. When it is negative the opposite effect is seen.

scholarly journals Effects of Internal Heat Generation and Variable Viscosity on Onset of Rayleigh-Benard Convection

2013 ◽  
Vol 5 (3) ◽  
pp. 200-213
Author(s):  
Gangadharaiah Y. H. ◽  
Suma S. P.
Keyword(s):  
Heat Source ◽  
Convective Instability ◽  
Variable Viscosity ◽  
Fluid Layer ◽  
Perturbation Technique ◽  
Internal Heat ◽  
Internal Heat Source ◽  
Wave Number ◽  
Regular Perturbation ◽  
Rayleigh Benard

In the present study, onset of stationary Rayleigh-Benard convective instability in a fluid layer, with internal heating and thermally dependent viscosity has been investigated by means of linear stability analysis. The dependence of viscosity is assumed to be exponential. The resulting eigen value problem is solved using a regular perturbation technique with wave number a as a perturbation parameter. The viscosity parameter and the presence of internal heat source play a decisive role on the stability characteristics of the system. It is observed that both stabilizing and destabilizing factors can be enhanced because of the simultaneous presence of a volumetric heat source and variable viscosity so that a more precise control (suppress or augment) of thermal convective instability in a fluid layer is possible.

BAYESIAN ESTIMATION OF A TIME DEPENDENT INTERNAL HEAT SOURCE IN A HETEROGENEOUS MEDIA

2016 ◽  
Author(s):  
Carolina Palma Naveira Cotta ◽  
Kelvin Chen ◽  
Christopher Tostado ◽  
Philippe Rollemberg d'Egmont ◽  
Fernando Duda ◽  
...  
Keyword(s):  
Heat Source ◽  
Bayesian Estimation ◽  
Heterogeneous Media ◽  
Internal Heat ◽  
Internal Heat Source ◽  
Time Dependent
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