Entropy analysis in mixed convective flow of hybrid nanofluid subject to melting heat and chemical reactions

Abstract

The present study discloses entropy analysis in flow of hybrid nanofluid under the influences of magnetohydrodynamics, variable viscosity and mixed convection. Melting heat, heat generation and radiation effects have been implemented for the second law of thermodynamics analysis. Homogeneous reaction of cubic auto-catalyst and first order heterogenous reaction regulate the concentration. Graphene oxide (GO) and molybdenum-disulphide(MoS2) are dealt as nanomaterials and water as a continuous phase liquid. Second law of thermodynamics is utilized for the formulation of entropy optimization rate. Bejan number has examined for the irreversibility process due to heat and mass transfers. Variations in entropy rate and Bejan number have been studied under the influences of sundry variables. Furthermore, comparative analysis of nanoliquid and hybrid nanoliquid has been examined for the entropy generation and Bejan number. Cylindrical coordinate system is taken for the problem formulation. Bvp4c maltab solver is used to deal with the obtained boundary layer problems. The findings of this study reveal that entropy rate and Bejan number in hybrid nanoliquid flow are noted maximum than the normal nanoliquid. The irreversibility due to heat transfer and entropy generation can be controlled by melting variable and temperature dependent viscosity variable.

Keywords

• Temperature dependent viscosity
• Molybdenum sulphide
• Graphene oxide
• Entropy generation
• Melting heat
• Reactions