Entropy optimization in radiative flow of Reiner-Rivlin material with heat source and modified Cattaneo-Christov heat and mass fluxes

Abstract

The present investigation deals with magnetized convective flow of Reiner-Rivlin liquid by stretched cylinder. Solutal and thermal transport analyses are discussed through Cattaneo-Christov heat and mass fluxes. Heat source and radiation effects are considered in thermal equation. Physical descriptions of chemical reaction and entropy generation are examined. By utilizing appropriate transformations, the model is transformed into dimensionless ordinary differential systems (ODEs). The obtained non-dimensional expressions are solved for convergent solutions by using optimal homotopy analysis method (OHAM). Influences for prominent variables on flow, concentration, temperature and entropy rate are explored. It is noticed that liquid flow enhances for mixed convection variable while opposite trend observed against magnetic field. Liquid flow is enhanced for buoyancy ratio parameter. Higher thermal relaxation time parameter results in thermal field enhancement. Entropy generation enhances against higher radiation variable. An enhancement in entropy rate is found for higher Brinkman number. Larger approximation of Schmidt number results in concentration reduction. Concentration decays for higher solutal relaxation time variable. Higher approximation of reaction variable decrease concentration.

Keywords

• Reiner-Rivlin fluid model
• Entropy generation
• Thermal radiation
• Cattaneo-Christov flux models
• Heat source and chemical reaction