Thermal radiation effects on MHD flow of a micropolar fluid over a stretching surface with variable thermal conductivity

2007 ◽  
Vol 375 (2) ◽  
pp. 401-410 ◽  
Author(s):  
Mostafa A.A. Mahmoud
2020 ◽  
Vol 68 (1) ◽  
pp. 1-10
Author(s):  
Lavanya

The present paper is concerned to analyze the effect of hall current on heat and thermal radiation and mass transfer of unsteady MHD flow of a viscoelastic micropolar fluid through a porous medium with chemical reaction. The governing partial differential equations are transformed to dimensionless equations using dimensionless variables. The dimensionless governing equations are then solved analytically using perturbation technique. The effects of various governing parameters on the velocity, temperature, concentration, skin-friction coefficient, Nusselt number and Sherwood number are shown in figures and tables and analyzed in detail.


2017 ◽  
Vol 11 ◽  
pp. 57-71 ◽  
Author(s):  
Machireddy Gnaneswara Reddy ◽  
M.V.V.N.L. Sudha Rani ◽  
Oluwole Daniel Makinde

The boundary layer flow of a heat transfer analysis on Carreau hydro magnetic fluid past a convectively nonlinear stretching surface analyzed. The nonlinear radiation, variable thermal conductivity and thermo diffusion effects are included in energy and species governing equations. The set of dimensionless integrated ordinary differential equations under the boundary restrictions obtained with the help of suitable similarity variable approach. The reduced governing flow equations with the boundary conditions are resolved numerically. Comparisons present results with existing literature and yields nice agreement .The description of results has been analyzed for the flow controlling embedded pertinent parameters by utilizing the plots and tables. It is revealed that energy distribution decays for enhancing values of variable thermal conductivity parameter whereas the opposite behavior to the thermal radiation parameter. The non-dimensional concentration boosts with the ascending values of Soret number.


Meccanica ◽  
2013 ◽  
Vol 48 (6) ◽  
pp. 1451-1464 ◽  
Author(s):  
Mahantesh M. Nandeppanavar ◽  
K. Vajravelu ◽  
M. Subhas Abel ◽  
M. N. Siddalingappa

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Wasim Jamshed ◽  
M. Prakash ◽  
S. Suriya Uma Devi ◽  
Rabha W. Ibrahim ◽  
Faisal Shahzad ◽  
...  

AbstractA novel hybrid nanofluid was explored in order to find an efficient heat-transmitting fluid to replace standard fluids and revolutionary nanofluids. By using tangent hyperbolic hybrid combination nanoliquid with non-Newtonian ethylene glycol (EG) as a basis fluid and a copper (Cu) and titanium dioxide (TiO2) mixture, this work aims to investigate the viscoelastic elements of the thermal transferring process. Flow and thermal facts, such as a slippery extended surface with magnetohydrodynamic (MHD), suction/injection, form factor, Joule heating, and thermal radiation effects, including changing thermal conductivity, were also integrated. The Keller–Box method was used to perform collective numerical computations of parametric analysis using governing equivalences. In the form of graphs and tables, the results of TiO2–Cu/EG hybrid nanofluid were compared to those of standard Cu/EG nanofluid in important critical physical circumstances. The entropy generation study was used to examine energy balance and usefulness for important physically impacting parameters. Detailed scrutiny on entropy development get assisted with Weissenberg number, magnetic parameter, fractional volumes, injection parameter, thermal radiation, variable thermal conductivity, Biot number, shape variation parameter, Reynolds and Brinkman number. Whereas the entropy gets resisted for slip and suction parameter. In this case, spotted entropy buildup with important parametric ranges could aid future optimization.


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