Unsteady Mixed Convection in Nanofluid Flow Through a Porous Medium with Thermal Radiation Using the Bivariate Spectral Quasilinearization Method

2017 ◽  
Vol 6 (2) ◽  
pp. 273-281 ◽  
Author(s):  
I. S. Oyelakin ◽  
S. Mondal ◽  
P. Sibanda
Keyword(s):  
Porous Medium ◽  
Mixed Convection ◽  
Thermal Radiation ◽  
Quasilinearization Method ◽  
Nanofluid Flow ◽  
Unsteady Mixed Convection ◽  
Flow Through

scholarly journals Thermal radiation effect on unsteady mixed convection boundary layer flow and heat transfer of nanofluid over permeable stretching surface through porous medium in the presence of heat generation

2021 ◽  
Vol 104 (3) ◽  
pp. 003685042110422
Author(s):  
Ahmed M. Sedki ◽  
S. M. Abo-Dahab ◽  
J. Bouslimi ◽  
K. H. Mahmoud
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Porous Medium ◽  
Mixed Convection ◽  
Thermal Radiation ◽  
Heat Generation ◽  
Convection Boundary Layer ◽  
Physical Parameters ◽  
Unsteady Mixed Convection ◽  
Special Cases

Here, we study the effect of mixed convection and thermal radiation on unsteady boundary layer of heat transfer and nanofluid flow over permeable moving surface through a porous medium. The effect of heat generation is also discussed. The equations governing the system are the continuity equation, momentum equation and the heat transfer equation. These governing equations transformed into a system of nondimensional equations contain many physical parameters that describe the study. The transformed equations are solved numerically using an implicit finite difference technique with Newton's linearization method. The thermo-physical parameters describe the study are the mixed convection parameter α, [Formula: see text], the Radiation parameter Rd, [Formula: see text] , porous medium parameter k, [Formula: see text], the nanoparticles volume [Formula: see text],[Formula: see text], the suction or injection parameter fw, [Formula: see text], the unsteadiness parameter At, [Formula: see text] and the heat source parameter λ  =  0.5 .The influence of the thermo-physical parameters is obtained analytically and displayed graphically. Comparisons of some special cases of the present study are performed with previously published studies and a good agreement is obtained.

scholarly journals Mixed convection in mhd second grade nanofluid flow through a porous medium containing nanoparticles and gyrotactic microorganisms with chemical reaction

Filomat ◽  
2019 ◽  
Vol 33 (14) ◽  
pp. 4627-4653 ◽  
Author(s):  
Noor Khan
Keyword(s):  
Porous Medium ◽  
Mixed Convection ◽  
Chemical Reaction ◽  
Thermal Conduction ◽  
Second Grade ◽  
Nanofluid Flow ◽  
Gyrotactic Microorganisms ◽  
Homotopy Analysis ◽  
Flow Through ◽  
The Stability

Mixed convection in magnetohydrodynamic second grade nanofluid flow through a porous medium containing nanoparticles and gyrotactic microorganisms with chemical reaction is considered. Buongiorno?s nanofluid model is used incorporating the buoyancy forces and Darcy-Forchheimer effect. Nanoparticles increase the thermal conduction in bioconvection flow and microorganisms simultaneously increase the stability of nanofluids. For the constructive (or generation) chemical reaction, the mass transfer displays an increasing behavior. Ordinary differential equations together with the boundary conditions are obtained through the similarity variables from the governing equations of the problem, which are solved by the Homotopy Analysis Method (HAM). The investigations are presented through graphs and the results are interpreted which depict the influences of all the embedded parameters.

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