Thermal explosion and irreversibility of hydromagnetic reactive couple stress fluid with viscous dissipation and Navier slips

The study examines the thermal explosion branched-chain and entropy generation as a result of irreversibility of hydromagnetic reactive couple stress liquid with viscous heating and Navier slips.The reactive fluid flow is enhanced by heat dependent pre-exponential factor and axial pressure gradient in a porous wall.The flow equations for the non-Newtonian couple stress fluid model and heat transfer are solved by employing a semi-analytical collocation weighted residual method(CWRM).The efficiency and validity of the obtained results was verified with the existing results.The results reveal that at low hysteresis magnetic and viscous dissipation the irreversibility process is minimized and thermodynamic equilibrium is improved.The results from this study can assist in understanding the relationship between thermal and thermal explosions branched-chain.

Thermodynamic second law analysis of magneto-micropolar fluid flow past nonlinear porous media with non-uniform heat source

This study analyzes the second law of thermodynamic for entropy generation in an irreversible hydromagneto-micropolar flow system with non-homogenous heat generation.The non-symmetric microstructure fluid flow past a stretching sheet with saturated porous nonlinear media under magnetic field influence.Ignoring the fluid particle deformation,the microstructure is assumed rigid with the viscous suspended medium.The reduced dimensionless nonlinear formulated model is computationally coded and solved to obtain solutions for the entropy volumetric production,Bejan number and heat transfer magneto-micropolar fluid.The parameter dependent solutions for the flow characteristics and irreversibility processes are plotted and discussed.It is revealed from the study that minimization of entropy generation in a magneto-micropolar flow system is possible by improving the thermodynamic equilibrium with low material variables,viscosity and hysteresis magnetic.Also,it is seen that the terms that encourage internal heat generation reduces the micropolar fluid viscosity in the system.