Abstract
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•MHD Reiner-Rivlin liquid is examined.•Soret and Dufour impacts are taken.•Ohmic heating in entropy generation is addressed.
Entropy production is novel prospective in many thermodynamic phenomena with applications in heat polymer processing optimization. Importance of entropy optimization is noticed in heat exchangers, combustion, thermal systems, nuclear reactions, turbine systems, porous media and many others. Entropy optimization is employed thermal energy measurement in thermodynamical system. Entropy generation rate is used to amplify thermodynamical system performances. Therefore the objective here is to discuss entropy generation in MHD Reiner-Rivlin fluid flow subject to stretching sheet with viscous dissipation, Ohmic heating and radiation features. Characteristics features of thermal-diffusion and diffusion-thermal are addressed. First order chemical reaction has been studied. Impact of entropy rate is addressed.
Non-linear dimensionless expressions are obtained through implementation of suitable transformations. Newton built in-shooting technique is implemented for computations.
Variation of velocity, concentration, thermal field and entropy generation against pertinent parameters have been studied. Computational outcomes of Nusselt and Sherwood numbers for emerging parameters are scrutinized. Velocity decay against magnetic variable occurs. However reverse impact holds for entropy generation.
Higher Reiner-Rivlin fluid parameter leads to amplify fluid flows. Higher estimation of magnetic variable has similar influence for temperature and thermal transport rate. Entropy rate and thermal distribution have similar impacts for radiation parameter. Decay in temperature is observed for Prandtl number. A similar trend holds for drag force and entropy rate through magnetic parameter. Entropy generation versus diffusion variable is augmented. Enhancement in concentration and mass transport rate is seen for Soret number. Concentration decay is observed for Schmidt number while reverse influence holds for Sherwood number.