Entropy generation minimization of Ag-Fe_3O_4/water-ethylene glycol squeezed hybrid nanofluid flow between parallel disks

Purpose This paper aims to examine the squeezing flow of hybrid nanofluid within the two parallel disks. The 50:50% water-ethylene glycol mixture is used as a base fluid to prepare Ag-Fe_3O_4 hybrid nanofluid. Entropy generation analysis is examined by using the second law of thermodynamics, and Darcy's modal involves estimating the behavior of a porous medium. The influences of Viscous dissipation, Joule heating and thermal radiation in modeling are further exerted into concern. Design/methodology/approach For converting partial differential systems to ordinary systems, a transformation technique is used. For the validation part, the numerical solution is computed by embracing a fourth-order exactness program (bvp4c) and compared with the analytical solution added by the homotopy analysis method (HAM). Graphical decisions expose the values of miscellaneous-arising parameters on the velocity, temperature and local-Nusselt numbers. Findings Hybrid nanofluid gives significant enhancement in the rate of heat transfer compared with nanofluid. The outcomes indicate that the average Nusselt number and entropy generation are increasing functions of the magnetic field, porosity and Brinkman number. When the thermal radiation rises, the average Nusselt number diminishes and the entropy generation advances. Furthermore, combining silver and magnetite nanoparticles into the water-ethylene glycol base fluid significantly enhances entropy generation performance. Originality/value Entropy generation analysis of the magneto-hydrodynamics (MHD) fluid squeezed between two parallel disks by considering Joule heating, viscous dissipation and thermal radiation for different nanoparticles is addressed. Furthermore, an appropriate agreement is obtained in comparing the numerical results with previously published and analytical results.

Automated summary

This paper examines the squeezing flow of hybrid nanofluid within two parallel disks. The study analyzes entropy generation by using the second law of thermodynamics and estimates the behavior of a porous medium using Darcy's model. The influences of viscous dissipation, Joule heating, and thermal radiation are also taken into account. The findings show that the hybrid nanofluid enhances heat transfer compared to nanofluid, and the average Nusselt number and entropy generation are affected by magnetic field, porosity, and Brinkman number. The study also demonstrates that the combination of silver and magnetite nanoparticles improves entropy generation performance in the water-ethylene glycol base fluid.