Heat transfer analysis and entropy generation in the nanofluids composed by Aluminum and [formula omitted] Aluminum oxides nanoparticles

Abstract

A porous rotating disk is used to study the second law of thermodynamics in relation to an electrically conducting, incompressible γ− alumina nanofluid. An external uniform vertical magnetic field. Base fluids are ethylene glycol and water. Alumina nanofluids make use of the experimentally derived viscosity and thermal conductivity models, as well as Brinkman viscosity and Maxwell's thermal conductivity models. Nuclear propulsion space vehicles can use the results of this research in rotating magnetohydrodynamic (MHD) energy generators and also thermal conversion processes. With shooting approach, fourth order Runge–Kutta method is used to solve the governing boundary layer equations numerically. The entropy generation equation can be obtained from the velocity and temperature gradients, respectively. There is a high level of agreement between the current study's findings and those of previously published studies. Using geometric and physical flow field-dependent parameters, this equation is nondimensional. Researchers have discovered that there are three types of velocity profiles that can be obtained: radial (or circumferential) velocity profiles, and tangential velocity profiles (radial velocity profiles). The influence of nanofluid type on fluid velocity, temperature, entropy generation, Bejan number, skin friction coefficient, and Nusselt number has been investigated. The same nanoparticles are expected to behave differently in temperature profiles with water and ethylene glycol. As well as demonstrating the potential of using magnetic rotating disk motors in revolutionary nuclear space propulsion engines, this model is valuable for increasing heat transfer in renewable energy systems and industrial thermal management.