CHEMICAL REACTION AND RADIATION EFFECTS ON MHD PULSATILE FLOW OF AN OLDROYD-B FLUID IN A POROUS MEDIUM WITH SLIP AND CONVECTIVE BOUNDARY CONDITIONS

2017 ◽  
Vol 20 (4) ◽  
pp. 257-301 ◽  
Author(s):  
T. Malathy ◽  
Suripeddi Srinivas ◽  
A. Subramanyam Reddy
Keyword(s):  
Porous Medium ◽  
Boundary Conditions ◽  
Chemical Reaction ◽  
Pulsatile Flow ◽  
Radiation Effects ◽  
Convective Boundary Conditions ◽  
Convective Boundary

Exact Solutions for the Magnetohydrodynamic Flow of a Jeffrey Fluid with Convective Boundary Conditions and Chemical Reaction

2012 ◽  
Vol 67 (8-9) ◽  
pp. 517-524 ◽  
Author(s):  
Ahmed Alsaedi ◽  
Zahid Iqbal ◽  
Meraj Mustafa ◽  
Tasawar Hayat
Keyword(s):  
Boundary Layer ◽  
Mass Transfer ◽  
Boundary Conditions ◽  
Heat And Mass Transfer ◽  
Chemical Reaction ◽  
Similarity Solutions ◽  
Jeffrey Fluid ◽  
Rheological Parameter ◽  
Convective Boundary Conditions ◽  
Convective Boundary

The two-dimensional magnetohydrodynamic (MHD) flow of a Jeffrey fluid is investigated in this paper. The characteristics of heat and mass transfer with chemical reaction have also been analyzed. Convective boundary conditions have been invoked for the thermal boundary layer problem. Exact similarity solutions for flow, temperature, and concentration are derived. Interpretation to the embedded parameters is assigned through graphical results for dimensionless velocity, temperature, concentration, skin friction coefficient, and surface heat and mass transfer. The results indicate an increase in the velocity and the boundary layer thickness by increasing the rheological parameter of the Jeffrey fluid. An intensification in the chemical reaction leads to a thinner concentration boundary layer.

scholarly journals Mixed convection over a horizontal circular cylinder embedded in porous medium immersed in a nanofluid with convective boundary conditions at lower stagnation point: A numerical solution

2018 ◽  
Vol 189 ◽  
pp. 02004
Author(s):  
Sarif Norhafizah Md ◽  
Sallhe Mohd Zuki ◽  
Roslinda Nazar
Keyword(s):  
Porous Medium ◽  
Boundary Conditions ◽  
Mixed Convection ◽  
Stagnation Point ◽  
Volume Fraction ◽  
Bottom Surface ◽  
Nanoparticle Volume Fraction ◽  
Convective Boundary Conditions ◽  
Convective Boundary ◽  
Convective Parameter

This study aims to examine the effect of governing parameters on the flow and heat transfer of the steady mixed convection flow embedded in porous medium with convective boundary conditions. The resulting system of nonlinear partial differential equations is solved numerically. The special case at the lower stagnation point of the cylinder is observed and the case where bottom surface of the cylinder is heated by convection from hot fluids is considered. Numerical solutions are obtained for the velocity, temperature and nanoparticle volume fraction profiles for two values of governing parameters namely convective parameter γ and Lewis number Le. It is found that as the convective parameter γ increases, velocity profile, temperature and nanoparticle volume fraction profile also increases.

Non-similar solution of free convective flow of power law nanofluids in porous medium along a vertical cone and plate with thermal and mass convective boundary conditions

2015 ◽  
Vol 93 (10) ◽  
pp. 1144-1155 ◽  
Author(s):  
W.A. Khan ◽  
M. Jashim Uddin ◽  
A.I.M. Ismail
Keyword(s):  
Boundary Layer ◽  
Porous Medium ◽  
Boundary Conditions ◽  
Power Law ◽  
Similar Solution ◽  
Convective Boundary Conditions ◽  
Concentration Increase ◽  
Vertical Cone ◽  
Convective Boundary ◽  
Special Cases

This paper investigates non-similar solution of free convective boundary layer flow of a viscous incompressible fluid along a vertical cone and plate embedded in a Darcian porous medium filled with power law non-Newtonian nanofluids. The effects of the thermal and mass convective boundary conditions are taken into account, which makes the present analysis practically applicable. The governing boundary layer equations are converted into a system of non-similar differential equations by using suitable transformations before being solved numerically. The effects of the controlling parameters on the dimensionless velocity, temperature, nanoparticle volume fraction, and the local Nusselt and Sherwood numbers are reported. It is found that the velocity, temperature, and concentration increase with mass transfer velocity for both the vertical plate and cone. Further, the velocity reduces whilst the temperature and concentration increase with increasing buoyancy ratio parameter for all three types of nanofluids in the case of both geometries. The local Nusselt and the local Sherwood numbers are found to be higher for dilatant nanofluids than pseudoplastic nanofluids and Newtonian fluids in each case. The numerical results for special cases are compared with the published data and an excellent agreement has been found.

MHD radiative flow of Williamson nanofluid along stretching sheet in a porous medium with convective boundary conditions

2021 ◽  
pp. 095440892110580
Author(s):  
Imran Ullah
Keyword(s):  
Porous Medium ◽  
Boundary Conditions ◽  
Stretching Sheet ◽  
Convection Flow ◽  
Convective Boundary Conditions ◽  
Nanoparticle Concentration ◽  
Convective Boundary ◽  
Similarity Transformations ◽  
Heating And Cooling ◽  
The Impact

Fluid heating and cooling is significant in a variety of industries, including power generation and transportation. Improvements in the thermal conductivity of the base fluid can also help in heat transmission. For this purpose, the effects of magneto hydrodynamics (MHD) and thermal radiation on mixed convection flow of Williamson nanofluid across a stretched sheet embedded in a porous medium in the presence of slip and convective boundary conditions is investigated. The Boungiorno model is adopted to analyze the impact of various dimensionless parameters on velocity, temperature, and nanoparticle concentration in the presence of slip and convective boundary conditions. The nonlinear governing equations are non-dimensionalized using similarity transformations, and the Keller box technique is utilized to solve them numerically. The current code is validated by generating numerical results for wall shear stress and compared them to previously published results. The comparison demonstrates that the outcomes are extremely similar. The results reveal that in the presence of a porous media, raising the magnetic and slip parameters reduced the nanofluid's velocity. It is also noticed that by increasing the radiation parameter, the heat and mass transfer rates on the surface of the stretching sheet are improved. In the presence of convective boundary conditions, the effect of Brownian motion and thermophoresis parameters on nanoparticle concentration was observed to be more profound.

Sign in / Sign up

Export Citation Format

Share Document