EFFECTS OF HEAT SOURCE/SINK AND NON UNIFORM TEMPERATURE GRADIENTS ON BENARD-SURFACE TENSION DRIVEN CONVECTION IN A COMPOSITE LAYER IN THE PRESENCE OF VERTICAL MAGNETIC FIELD

2020 ◽  
Vol 33 (02) ◽  
Author(s):  
MANJUNATHA N ◽  
◽  
SUMITHRA R ◽  
Keyword(s):  
Magnetic Field ◽  
Surface Tension ◽  
Heat Source ◽  
Composite Layer ◽  
Temperature Gradients ◽  
Vertical Magnetic Field ◽  
Uniform Temperature ◽  
Source Sink

Combined effects of nonuniform temperature gradients and heat source on double diffusive Benard-Marangoni convection in a porous-fluid system in the presence of vertical magnetic field

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
N. Manjunatha ◽  
R. Sumithra ◽  
R.K. Vanishree
Keyword(s):  
Magnetic Field ◽  
Heat Source ◽  
Marangoni Number ◽  
Marangoni Convection ◽  
Fluid Layer ◽  
Temperature Gradients ◽  
Vertical Magnetic Field ◽  
Nonuniform Temperature ◽  
Fluid System ◽  
Double Diffusive

The physical configuration of the problem is a porous-fluid layer which is horizontally unbounded, in the presence of uniform heat source/sink in the layers enclosed by adiabatic and isothermal boundaries. The problem of double diffusive Bènard-Marangoni convection in the presence of vertical magnetic field is investigated on this porous-fluid system for non-Darcian case and is subjected to uniform and nonuniform temperature gradients. The eigenvalue, thermal Marangoni number is obtained in the closed form for lower rigid and upper free with surface tension velocity boundary conditions. The influence of various parameters on the Marangoni number against thermal ratio is discussed. It is observed that the heat absorption in the fluid layer and the applied magnetic field play an important role in controlling Benard-Marangoni convection. The parameters which direct this convection are determined and the effect of porous parameter is relatively interesting.

scholarly journals Triple Diffusive Surface Tension Driven Convection in a Composite Layer in the Presence of Vertical Magnetic Field

2020 ◽  
Vol 9 (3) ◽  
pp. 1727-1734
Keyword(s):  
Magnetic Field ◽  
Surface Tension ◽  
Closed Form ◽  
Fluid Layer ◽  
Composite Layer ◽  
Microgravity Condition ◽  
Closed Form Solution ◽  
Form Solution ◽  
Vertical Magnetic Field ◽  
Composite Layers

The problem of triple diffusive surface tension driven convection is investigated in a composite layer in the presence of vertical magnetic field. A closed form solution is obtained under microgravity condition. The parameters suitable for fluid layer dominant and porous layer dominant composite layers are determined. The parameters appropriate for controlling the convection are determined which are useful to manufacture pure crystals.

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