Effects of temperature-dependent viscosity on natural convection in a porous cavity with a circular cylinder under local thermal non-equilibrium condition

2021 ◽  
Vol 159 ◽  
pp. 106570
Author(s):  
Lei Wang ◽  
Changsheng Huang ◽  
Junjie Hu ◽  
Baochang Shi ◽  
Zhenhua Chai
Keyword(s):  
Natural Convection ◽  
Circular Cylinder ◽  
Equilibrium Condition ◽  
Temperature Dependent ◽  
Temperature Dependent Viscosity ◽  
Porous Cavity ◽  
Effects Of Temperature ◽  
Dependent Viscosity ◽  
Non Equilibrium

scholarly journals Effect of thermal radiation on natural convection in a square porous cavity filled with a fluid of temperature-dependent viscosity

2018 ◽  
Vol 22 (1 Part B) ◽  
pp. 391-399 ◽  
Author(s):  
Marina Astanina ◽  
Mikhail Sheremet ◽  
Jawali Umavathi
Keyword(s):  
Natural Convection ◽  
Thermal Radiation ◽  
Numerical Study ◽  
Darcy Number ◽  
Radiation Parameter ◽  
Temperature Dependent ◽  
Temperature Dependent Viscosity ◽  
Porous Cavity ◽  
Different Temperatures ◽  
Dependent Viscosity

A numerical study of the natural convection combined with thermal radiation inside a square porous cavity filled with a fluid of temperature-dependent viscosity is carried out. The side horizontal walls are assumed to be adiabatic while both the left and right vertical walls are kept at constant but different temperatures. The Rosseland diffusion approximation is used to describe the radiative heat flux in the energy equation. The governing equations formulated in dimensionless stream function, vorticity, and temperature variables are solved using finite difference method. A parametric analysis illustrating the effects of the radiation parameter (0 ? Rd ? 10), Darcy number (10?5 ? Da ? 10?2), and viscosity variation parameter (0 ? C ? 6) on fluid flow and heat transfer is implemented. The results show an essential intensification of convective flow with an increase in the radiation parameter.

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