Chemically reacting mixed convective Casson fluid flow in the presence of MHD and porous medium through group theoretical analysis

Heat Transfer ◽  
2020 ◽  
Vol 49 (8) ◽  
pp. 4657-4677
Author(s):  
Muhammad Nazim Tufail ◽  
Musharafa Saleem ◽  
Qasim Ali Chaudhry
Keyword(s):  
Porous Medium ◽  
Fluid Flow ◽  
Theoretical Analysis ◽  
Casson Fluid ◽  
Chemically Reacting ◽  
Group Theoretical Analysis

Heat generating/absorbing and chemically reacting Casson fluid flow over a vertical cone and flat plate saturated with non-Darcy porous medium

2017 ◽  
Vol 27 (1) ◽  
pp. 156-173 ◽  
Author(s):  
Mythili Durairaj ◽  
Sivaraj Ramachandran ◽  
Rashidi Mohammad Mehdi
Keyword(s):  
Heat Transfer ◽  
Porous Medium ◽  
Fluid Flow ◽  
Flat Plate ◽  
Casson Fluid ◽  
Physical Parameters ◽  
Vertical Cone ◽  
Soret And Dufour Effects ◽  
Content Type ◽  
Chemically Reacting

Purpose The present investigation aims to deal with the study of unsteady, heat-generating/-absorbing and chemically reacting Casson fluid flow over a vertical cone and flat plate saturated with non-Darcy porous medium in the presence of cross-diffusion effects. Design/methodology/approach A numerical computation for the governing equations has been performed using implicit finite difference method of Crank–Nicolson type. Findings The influence of various physical parameters on velocity, temperature and concentration distributions is illustrated graphically, and the physical aspects are discussed in detail. Numerical results for average skin-friction, Nusselt number and Sherwood number are tabulated for the pertaining physical parameters. Results indicate that Soret and Dufour effects have notable influence on heat and mass transfer characteristics of the fluid when the temperature and concentration gradients are high. It is also observed that the consideration of heat generation/absorption plays a vital role in predicting the heat transfer characteristics of moving fluids. Research limitations/implications Consider a two-dimensional, unsteady, free convective flow of an incompressible Casson fluid over a vertical cone and a flat plate saturated with non-Darcy porous medium. The fluid properties are assumed to be constant except for density variations in the buoyancy force term. The fluid flow is moderate and the permeability of the medium is assumed to be low, so that the Forchheimer flow model is applicable. Practical implications The flow of Casson fluids (such as drilling muds, clay coatings and other suspensions, certain oils and greases, polymer melts and many emulsions), in the presence of heat transfer, is an important research area because of its relevance in the optimized processing of chocolate, toffee and other foodstuffs. Social implications In the heat and mass transfer investigations, the Casson fluid model is found to be accurately applicable in many practical situations in the wings of polymer processing industries and biomechanics, etc.; some prominent examples are silicon suspensions, suspensions of bentonite in water and lithographic varnishes used for printing inks. Originality/value The motivation of the present study is to bring out the effects of heat source/sink, Soret and Dufour effects on chemically reacting Casson fluid flow over a vertical cone and flat plate saturated with non-Darcy porous medium. The flow of Casson fluids (such as certain oils and greases, polymer melts and many emulsions) in the presence of heat transfer is an important research area because of its relevance in the optimized processing of chocolate, toffee and other foodstuffs. A numerical computation for the governing equations has been performed using implicit finite difference method of the Crank–Nicolson type.

scholarly journals BOUNDARY LAYER CONTROL OF A RADIATIVE CASSON FLUID FLOW PAST A PERMEABLE RIGA-PLATE WITH UNIMOLECULAR CHEMICAL REACTION

2019 ◽  
Vol 49 (4) ◽  
pp. 233-239
Author(s):  
Parasuraman Loganathan ◽  
Krishnamurthy Deepa
Keyword(s):  
Boundary Layer ◽  
Fluid Flow ◽  
Leading Edge ◽  
Boundary Layer Separation ◽  
Casson Fluid ◽  
Viscous Drag ◽  
Flow Past ◽  
Riga Plate ◽  
Chemically Reacting ◽  
Layer Control

The buoyancy driven, chemically reacting and radiative Casson fluid flow past an impulsively started permeable Riga-plate is investigated through the numerical solution obtained by Crank-Nicholson implicit scheme of finite difference method. The main aim of this study is to control the boundary layer separation.  Escalating modified Hartmann number and the distance from leading edge of the plate reduces the viscous drag so that the separation can be controlled. Effects of permeability on the flow configuration are also elucidated. The results are validated by comparing the solutions of the literature which already exists.

scholarly journals Magnetohydrodynamic Casson Fluid Flow with Hall Effect and Rotation in a Porous Medium

2017 ◽  
Vol 15 (2) ◽  
pp. 277-288
Author(s):  
P. Thirunavukarasu ◽  
◽  
S. Bhuvaneswari
Keyword(s):  
Porous Medium ◽  
Fluid Flow ◽  
Hall Effect ◽  
Casson Fluid
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