Magnetohydrodynamics Natural Convection of a Triangular Cavity Involving Ag-MgO/Water Hybrid Nanofluid and Provided with Rotating Circular Barrier and a Quarter Circular Porous Medium at its Right-Angled Corner

Abstract

The current paper studied the behavior of a triangular cavity occupied with Ag-MgO/water nanofluid under MHD natural convection and provided with a rotating circular barrier, while the right-angled corner is equipped with quarter-circle porous medium and maintained at a fixed hot temperature T h . Several parameters are tested such as Rayleigh number (10 3 ≤ Ra ≤ 10 6 ), Hartmann number (0 ≤ Ha ≤ 80) and Darcy number (10 −5 ≤ Da ≤ 0.15). The obtained results depict the enhancing effect of Ra and the controlling role of the magnetic parameter on heat transport. Increasing the characteristics of the porous media such as the porosity and the permeability showed a substantial impact on the heat transport efficiency within the enclosure. Moreover, the novelty findings in this paper are principally illustrated in the boosting impact of raising the porous medium thickness when it is associated with the growing up of the heated parts of the geometry by increasing the dimension of the radius (r p ). Also, the rotational velocity (ω) and the radius (r ob ) of the circular obstacle are tested and showed an important influence on the energy transport within the cavity. Moreover, the obtained results by modifying the length (a) prove its pertinent influence on the heat transfer performance.

A Casson nanofluid flow within the conical gap between rotating surfaces of a cone and a horizontal disc

“…After the incorporation of nanofluids, which extended the study of this topic, this significance increased dramatically. Amine et al 12 investigated the behavior of a triangle cavity containing an Ag-MgO/water hybrid nanofluid with a revolving circular boundary under MHD natural convection, with a right-angled corner containing a quarter circular porous medium and kept at a uniform hot temperature. Along with the vast variety of MHD applications in astrophysics, plasma, and other fields, physicists and mathematicians have conducted several studies.…”

Influence of entropy on Brinkman–Forchheimer model of MHD hybrid nanofluid flowing in enclosure containing rotating cylinder and undulating porous stratum

“…The density and the thermal conductivity as well as the heat capacity of the hybrid nanofluid can be given as the following 29 , 31 …”

“…The effective dynamic viscosity of the hybrid nanofluid based on the Brinkman mode is considered as 29 , 31 : where, signifies the nanoparticle concentration factor. , , and are fluid viscidness, consistency, operative heat capacitance and thermally conductance of the basefluid, correspondingly.…”

“…They demonstrated that increasing the Rayleigh number and reducing the Hartmann number enhances the thermal efficiency of the chamber. Belhadj et al 29 investigated the nanofluid natural convection response inside a triangular cavity with an inner partial porous media installed at the right-angled corner. They noticed that the increase in Darcy number and the porosity has a boosting effect on the heat transfer efficiency.…”

Effects of different thermal modes of obstacles on the natural convective Al2O3-water nanofluidic transport inside a triangular cavity

“…He detected heat transport reduction along the lower wall for Hartmann number. Amine et al 48 addressed the MHD Ag-MgO/Water hybrid nanoliquid stream inside a triangular chamber with the circular porous regime and spinning circular barrier and observed obstacles influence in the flow topology. Hiba et al 49 analyzed the streamlines and thermal analysis of Ag-MgO/water hybrid nanoliquids inside a grooved compartment and observed heat transport enhancement for the Rayleigh number, while the reverse is marked for Hartmann number.…”