Influence of Chemical Reaction on Mass Transport in Yield Stress Exhibiting Flow Regime

In this study, the simulations for first-order chemical reactions (constructive and destructive) in the flow of the Casson fluid with temperature-dependent viscosity and temperature-dependent thermal conductivity are carried out in the presence of the mass transport of the solute with a temperature-...

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Bibliographic Details
Published in:Theoretical foundations of chemical engineering 2020-11, Vol.54 (6), p.1327-1339
Main Authors: Uzma Arif, Nawaz, M., Rana, Shafia, Qureshi, Imran Haider, Elmasry, Yasser, Hussain, Shafiq
Format: Article
Language:English
Subjects:
Chemical reactions
Chemistry
Chemistry and Materials Science
Diffusion coefficient
Finite element method
Heat conductivity
Heat flux
Heat transfer
Industrial Chemistry/Chemical Engineering
Mass transport
Mathematical analysis
Ohmic dissipation
Simulation
Stress concentration
Temperature dependence
Thermal conductivity
Yield stress
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Summary:In this study, the simulations for first-order chemical reactions (constructive and destructive) in the flow of the Casson fluid with temperature-dependent viscosity and temperature-dependent thermal conductivity are carried out in the presence of the mass transport of the solute with a temperature-dependent mass diffusion coefficient. First-order constructive and destructive chemical reactions are studied. For simulations, the governing equations are solved by the Galerkin finite element method (GFEM). GFEM equations are used to develop a computer code, and simulations are run for computational domain [0,7] with computational tolerance 10 –6 . Dissipation effects (viscous dissipation and Ohmic dissipation) cause a significant increase in the concentration field. The constructive and destructive chemical reactions have opposite effects on the concentration profile. The stresses at the stretching sheet for the hydromagnetic flow are higher than those at the surface for the hydrodynamic flow. The heat flux at the surface for the Casson fluid increases as the thermal conductivity increases due to a rise in temperature, whereas the mass flux at the surface decreases as the mass diffusion coefficient increases. The mass flux at the surface is an increasing function for the destructive chemical reaction, whereas the mass flux at the surface decreases for the constructive chemical reaction.
ISSN:0040-5795
1608-3431
DOI:10.1134/S0040579520060123