Significance of non-Fourier heat flux and radiation on PEG – Water based hybrid Nanofluid flow among revolving disks with chemical reaction and entropy generation optimization

Abstract

Investigation of entropy generation assures significantly the trustworthiness of mechanical and electronic components. Entropy generation is useful in many applications including heat exchangers, capacitors, circuit boards and resistors. In this article, we discussed the optimization of entropy generation on a radiative MHD fluid flow combined with CCHF model in two instances i.e., hybrid nanofluid(PEG − Water + ZrO2 + MgO)and mono- nanofluid(PEG − Water + ZrO2)amidst (two) revolving disks with chemical reaction. Mathematical model describing the fluid flow is resolved by using a shooting procedure together with R-K 4th order method after converting as a system of ODEs. Outcomes are displayed via plots and impacts of the pertinent parameters on physical quantities such as heat transfer rate are elucidated using a statistical tool, correlation coefficient in two cases. Primary conclusions of this study are larger stretching parameter of the lower disk ameliorates axial velocity, volumetric nanoparticle parameter alleviates radial velocity, higher thermal relaxation parameter belittles the fluid temperature, radiation and rotation parameters improve the entropy generation in the fluid flow and concentration diminishes with larger chemical reaction parameter. Further, we observed that elongating parameters of both disks are having significant positive association with surface drag force near the disks in both occasions. However, there is a significant negative association between the heat transfer rates. Rotation parameters improves the entropy generation in the fluid flow. Validation of the current study is done by comparing the present findings with the available outcomes in the literature and found an adequate agreement.