Local thermal non-equilibrium condition on mixed convection of a nanofluid-filled undulating cavity containing obstacle and saturated by porous media
Noura Alsedais, Abdelraheem M. Aly, M. A. Mansour
Abstract
The paper is aiming to examine the magnetic impacts on the mixed convection of a nanofluid contained by an undulating porous cavity with the help of radiative and heat generation. The condition of the local thermal non-equilibrium (LTNE) is considered. The partial heater is in the corrugated bottom partition and the top corrugated partition has Tc. The vertical walls are adiabatic with a lid-velocity in the right wall. The regulating equations are worked out by the finite volume method (FVM). The involved parameters are the heater length B (between 0.2 and 0.8), heat generation/absorption coefficient Q (between −2 and 2), modified conductivity ratio (between kr=0-10), thermal radiation parameter Rd (between 0 and 5), a porosity parameter ε (between 0.4 and 0.9), heater position D (between 0.3 and 0.7), thermal conductivity ratio kfs (between 4 and 0.25), an undulating number λ (between 1 and 5), Darcy parameter Da (between 10-1 and 10-5), an inclination angle of a cavity α (between 0°and 90°), nanoparticles parameter ϕ (between 0 and 0.1), and coefficient of an inter-phase heat transfer H∗ (between 0 and 5000). The results indicated that the growth in nanoparticles parameter augments the profiles of average Nu of a fluid phase. The heat transfer is influenced by the variations in the length/position of the heater source. The maximum of the streamlines decreases by 97.55% as Da decreases from 10-1 to 10-5 and increases by 42.86% as an undulating number λ raises from 1 to 5.