scholarly journals Unsteady Stagnation-Point Flow of a Viscoelastic Fluid in the Presence of a Magnetic Field

2008 ◽  
Vol 2008 ◽  
pp. 1-15
Author(s):  
F. Labropulu
Keyword(s):  
Magnetic Field ◽  
Stagnation Point ◽  
Infinite Plate ◽  
Transverse Magnetic ◽  
Weissenberg Number ◽  
Stagnation Point Flow ◽  
Two Dimensional ◽  
Harmonic Oscillations ◽  
Finite Difference Technique ◽  
Walters B Fluid

The unsteady two-dimensional stagnation point flow of the Walters B' fluid impinging on an infinite plate in the presence of a transverse magnetic field is examined and solutions are obtained. It is assumed that the infinite plate aty=0is making harmonic oscillations in its own plane. A finite difference technique is employed and solutions for small and large frequencies of the oscillations are obtained for various values of the Hartmann's number and the Weissenberg number.

scholarly journals Unsteady stagnation point flow of a non-Newtonian second-grade fluid

2003 ◽  
Vol 2003 (60) ◽  
pp. 3797-3807 ◽  
Author(s):  
F. Labropulu ◽  
X. Xu ◽  
M. Chinichian
Keyword(s):  
Finite Difference ◽  
Stagnation Point ◽  
Infinite Plate ◽  
Second Grade ◽  
Two Dimensional ◽  
Second Grade Fluid ◽  
Harmonic Oscillations ◽  
Finite Difference Technique ◽  
Two Dimensional Flow ◽  
Grade Fluid

The unsteady two-dimensional flow of a viscoelastic second-grade fluid impinging on an infinite plate is considered. The plate is making harmonic oscillations in its own plane. A finite difference technique is employed and solutions for small and large frequencies of the oscillations are obtained.

Two-dimensional oblique stagnation-point flow towards a stretching surface in a viscoelastic fluid

Open Physics ◽  
2011 ◽  
Vol 9 (1) ◽  
Author(s):  
Iqbal Husain ◽  
Fotini Labropulu ◽  
Ioan Pop
Keyword(s):  
Partial Differential Equations ◽  
Finite Difference ◽  
Differential Equations ◽  
Stagnation Point ◽  
Shooting Method ◽  
Stagnation Point Flow ◽  
Two Dimensional ◽  
Stretching Surface ◽  
Finite Difference Technique ◽  
Walters B Fluid

AbstractIn this paper, the steady two-dimensional stagnation-point flow of a viscoelastic Walters’ B’ fluid over a stretching surface is examined. It is assumed that the fluid impinges on the wall obliquely. Using similarity variables, the governing partial differential equations are transformed into a set of two non-dimensional ordinary differential equations. These equations are then solved numerically using the shooting method with a finite-difference technique.

scholarly journals Stagnation-point flow of the Walters' B' fluid with slip

2004 ◽  
Vol 2004 (61) ◽  
pp. 3249-3258 ◽  
Author(s):  
F. Labropulu ◽  
I. Husain ◽  
M. Chinichian
Keyword(s):  
Finite Difference ◽  
Stagnation Point ◽  
Stagnation Point Flow ◽  
Two Dimensional ◽  
Finite Difference Technique ◽  
Walters B Fluid

The steady two-dimensional stagnation point flow of a non-Newtonian Walters' B' fluid with slip is studied. The fluid impinges on the wall either orthogonally or obliquely. A finite difference technique is employed to obtain solutions.

scholarly journals NUMERICAL SIMULATION OF MHD STAGNATION POINT FLOW TOWARDS A HEATED AXISYMMETRIC SURFACE

2011 ◽  
Vol 52 (3) ◽  
pp. 301-308
Author(s):  
MUHAMMAD ASHRAF ◽  
M. ANWAR KAMAL
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Stagnation Point ◽  
Applied Magnetic Field ◽  
Nonlinear Differential Equations ◽  
Transverse Magnetic ◽  
Stagnation Point Flow ◽  
Suction Parameter ◽  
Similarity Transformations ◽  
Axisymmetric Surface

AbstractThe problem of stagnation point flow with heat transfer of an electrically conducting fluid impinging normally on a permeable axisymmetric surface in the presence of a uniform transverse magnetic field is analysed. The governing nonlinear differential equations and their associated boundary conditions are reduced to dimensionless form using suitable similarity transformations. Comparison with previously published work shows good agreement. Effects of the injection–suction parameter, magnetic parameter and Prandtl number on the flow and thermal fields are presented. The investigations show that the wall shear stress and heat transfer rate from the surface increase with increased applied magnetic field. An increase in the velocity and thermal boundary layer thicknesses is observed with an increase in the wall injection, while the velocity and thermal boundary layers become thinner when increasing the wall suction and applied magnetic field.

scholarly journals Stagnation-Point Flow of Magneto-Williamson Nanofluid over a Stretching Material with Ohmic Heating and Entropy Analysis

2021 ◽  
Vol 7 (1) ◽  
pp. 131-145
Author(s):  
Ephesus Fatunmbi ◽  
◽  
Fazle Mabood ◽  
Adetunji Adeniyan ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Stagnation Point ◽  
Entropy Generation ◽  
Ohmic Heating ◽  
Weissenberg Number ◽  
Stagnation Point Flow ◽  
Viscous Drag ◽  
Entropy Generation Number ◽  
Efficient Performance ◽  
Surface Convection

This study communicates stagnation-point flow in magneto-Williamson nanofluid along a convectively heated nonlinear stretchable material in a porous medium. The impacts of Joule heating, thermophoresis together with Brownian motion are also checked in this investigation. In addition, thermodynamic second law is applied to develop entropy generation analysis of crucial parameters with identification of parameters capable of minimizing energy loss in the system. The transport equations are simplified into ordinary differential equations and then integrated numerically using Runge-Kutta-Fehlberg with shooting technique. The effects of the emerging parameters on the dimensionless velocity, temperature, concentration and entropy generation number are publicized through tables and graphs with appropriate discussions. In the limiting conditions, the results are found to conform accurately with published studies in the literature. It is found that the viscous drag can be reduced by lowering the magnitude of Weissenberg number, magnetic field and Darcy parameters while heat transfer at the surface improves in the presence of surface convection, temperature ratio and thermal radiation parameters. Besides, the analysis reveals that entropy generation can be minimized by lowering the magnitude of magnetic field, Schmidt number and surface convection parameters. The reduction in these parameters will promote efficient performance of thermal devices. More so, the results obtained in this study can be useful for the construction of appropriate thermal devices for use in energy and electronic devices.

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