scholarly journals Impact of Lorentz Force in Thermally Developed Pulsatile Micropolar Fluid Flow in a Constricted Channel

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2173
Author(s):  
Muhammad Umar ◽  
Amjad Ali ◽  
Zainab Bukhari ◽  
Gullnaz Shahzadi ◽  
Arshad Saleem
Keyword(s):  
Reynolds Number ◽  
Fluid Flow ◽  
Thermal Radiation ◽  
Lorentz Force ◽  
Axial Velocity ◽  
Micropolar Fluid ◽  
Rotation Velocity ◽  
Micropolar Fluid Flow ◽  
The Impact ◽  
Constricted Channel

This work aimed to analyze the heat transfer of micropolar fluid flow in a constricted channel influenced by thermal radiation and the Lorentz force. A finite difference-based flow solver, on a Cartesian grid, was used for the numerical solution after transforming the governing equations into the vorticity-stream function form. The impact of various emerging parameters on the wall shear stress, axial velocity, micro-rotation velocity and temperature profiles is discussed in this paper. The temperature profile is observed to have an inciting trend towards the thermal radiation, whereas it has a declining trend towards the Hartman and Prandtl numbers. The axial velocity profile has an inciting trend towards the Hartman number, whereas it has a declining trend towards the micropolar parameter and Reynolds number. The micro-rotation velocity escalates with the micropolar parameter and Hartman number, whereas it de-escalates with the Reynolds number. The Nusselt number is observed to have a direct relationship with the Prandtl and Reynolds numbers.

scholarly journals Steady Magnetohydrodynamic Micropolar Fluid Flow and Heat and Mass Transfer in Permeable Channel with Thermal Radiation

Coatings ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 11
Author(s):  
Vandana Agarwal ◽  
Bhupander Singh ◽  
Amrita Kumari ◽  
Wasim Jamshed ◽  
Kottakkaran Sooppy Nisar ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Thermal Radiation ◽  
Micropolar Fluid ◽  
Numerical Technique ◽  
Analytic Solutions ◽  
Point Of View ◽  
Physical Point ◽  
Permeable Channel ◽  
Micropolar Fluid Flow

The present work is devoted to the study of magnetohydrodynamic micropolar fluid flow in a permeable channel with thermal radiation. The Rosseland approximation for thermal radiation is taken into account in the modelling of heat transfer. The governing equations are expressed in non-dimensional form. The Homotopy Perturbation Method (HPM) is briefly introduced and applied to derive the solution of nonlinear equations. The effects of various involved parameters like Reynolds number, microrotation parameter and Prandtl number on flow and heat transfer are discussed. Further, their effects on Nusselt and Sherwood numbers are also investigated from the physical point of view. Analytic solutions of the problem are obtained by HPM and a numerical technique bvp4c package MATLAB is applied to predict the graphs between different parameters.

KELLER-BOX SOLUTION OF THE STAGNATION POINT MICROPOLAR FLUID FLOW BETWEEN POROUS PLATES WITH INJECTION

2021 ◽  
Vol 10 (1) ◽  
pp. 517-526
Author(s):  
A. Bhat ◽  
N.N. Katagi
Keyword(s):  
Reynolds Number ◽  
Fluid Flow ◽  
Micropolar Fluid ◽  
Axisymmetric Flow ◽  
Velocity Slip ◽  
Slip Coefficient ◽  
Micropolar Fluid Flow ◽  
Special Cases ◽  
Finite Difference Solution ◽  
Comparison Of The Results

The present study deals with the steady axisymmetric flow of micropolar fluid between two parallel porous plates when the fluid is injected through both walls at the same rate. The influence of velocity slip at the porous surface is analyzed. A detailed finite-difference solution is developed for the resulting non-linear coupled differential equations representing velocities and microrotation. The numerical computations are obtained for radial, axial velocities, and microrotation for varying injection Reynolds number, micropolar parameter, and slip coefficient. Further, a comparison of the results is given with those obtained in the literature with different methods as special cases.

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