Entropy optimized flow of Reiner-Rivlin nanofluid with chemical reaction subject to stretchable rotating disk

Abstract

The theme of this article is to address the irreversibility in an incompressible Reiner-Rivlin nanofluid subject to stretchable rotating disk. Dissipation and radiation in heat expression are incorporated. Random diffusion and thermophoresis impacts are addressed. Physical feature of entropy rate is also accounted. Furthermore, first order reaction rate is scrutinized. Ordinary system (ODEs) is obtained through implementation of suitable variables. To construct convergent solution, we employed numerical method (ND-solve method). Outcomes for flow variables on velocity profile, thermal field, concentration and entropy optimization are discussed. Computational outcomes of moment coefficient, skin friction coefficient, entrainment velocity (disk pumping efficiency), Sherwood number and gradient of temperature versus sundry variables are studied. An expansion in radial velocity is observed for Reiner-Rivlin fluid variable. An augmentation in stretching parameter leads to opposite behavior of radial and tangential velocity components. An amplification in temperature distribution and entropy rate are observed for radiation variable. An improvement in thermophoresis parameter augments concentration and temperature distribution. Higher approximation of Brinkman number rises entropy generation rate.

Keywords

• Reiner-Rivlin nanofluid
• Rotating disk
• Thermal radiation
• Thermophoresis
• Dissipation
• Entropy generation