Double-diffusive convection of a nanofluid in a porous cavity containing rotating hexagon and circular cylinders: ISPH simulations

Abstract

Purpose The purpose of this study is to apply an incompressible smoothed particle hydrodynamics (ISPH) method to simulate the Magnetohydrodynamic (MHD) free convection flow of a nanofluid in a porous cavity containing rotating hexagonal and two circular cylinders under the impacts of Soret and Dufour numbers. Design/methodology/approach The inner shapes are rotating around a cavity center by a uniform circular motion at angular rate ω. An inner hexagonal shape has higher temperature Th and concentration Ch than the inner two circular cylinders in which the temperature is Tc and concentration is Cc. The performed numerical simulations are presented in terms of the streamlines, isotherms and isoconcentration as well as the profiles of average Nusselt and Sherwood numbers. Findings The results indicated that the uniform motions of inner shapes are changing the characteristics of the fluid flow, temperature and concentration inside a cavity. An augmentation on a Hartman parameter slows down the flow speed and an inclination angle of a magnetic field raises the flow speed. A rise in the Soret number accompanied by a reduction in the Dufour number lead to a growth in the concentration distribution in a cavity. Originality/value ISPH method is used to simulate the double-diffusive convection of novel rotating shapes in a porous cavity. The inner novel shapes are rotating hexagonal and two circular cylinders.

Cross-diffusion of the stagnation-point solar radiated micropolar liquid flow through a convected surface

“…Exceptional work on Dufour and Soret phenomena on hydrology and petrology consist of doubled alloys solidification, isotope separation, chemical reactors, pollutant migration of groundwater, and multi-component melts. Aly and Raizah 25 scrutinized the MHD free convection flow on the nanofluid by the permeable cavity containing two circular cylinders and rotating hexagonal below the effects on Dufour and Soret numbers. Lee et al 26 have considered thermophoretic microfluidic cells for studying the Soret coefficient to colloidal particles.…”

Cooling of a periodic heat-generating solid element in an electronic cabinet using a non-Newtonian pseudoplastic nanofluid and a heat-conducting substrate

“…The authors found that the presence of blades has a positive effect on the process under study. Aly and Raizah (2022) have studied the free convection of a nanofluid in a square porous cavity containing rotating hexagonal and two circular cylinders, under the influence of Soret and Dufour phenomena. The hexagonal porous insert has a higher temperature than the cylindrical ones.…”