https://doi.org/10.1140/epjs/s11734-024-01111-8
Regular Article
Numerical study of thermo-solutal convection of a Cu/water micropolar nanofluid in a cubic cavity saturated with porous media
1
Research Laboratory of Metrology and Energy Systems, Energy Engineering Department, National Engineering School, Monastir University, Monastir City, Tunisia
2
Physics Department, College of Sciences Abha, King Khalid University, Abha City, Saudi Arabia
3
Research Laboratory of Metrology and Energy Systems LR81ES21, Energy Engineering Department, National Engineering School, Monastir University, Monastir City, Tunisia
4
Higher School of Sciences and Technology of Hammam Sousse, Sousse University, Sousse City, Tunisia
5
Mechanical Engineering Department, College of Engineering, University of Babylon, Babylon City, Iraq
6
Renewable Energy and Materials Laboratory (LERM), Department of Mechanical Engineering, Faculty of Technology, University of Medea, Medea City, Algeria
7
Department of Mechanical Engineering, College of Engineering, University of Ha’il, 81451, Ha’il City, Saudi Arabia
Received:
21
January
2023
Accepted:
2
February
2024
Published online:
26
February
2024
This research pertains to the numerical analysis on thermo-solutal free convection of micropolar nanofluid in a cubic porous cavity. The Brinkman–Darcy formulation was used to pattern the flow of nanofluid in porous media. The governing equations are discretized by the finite volume method. Computations are realized for a range of pertinent parameters as porous Rayleigh number (100 
Ra* 1000), Darcy number (10–1 Da 10–3), Rayleigh number (10–3 Ra 106), micropolar parameter (0 K 5), nanoparticles’s volume fraction (0.01 
0.04), and porosity (0.2 
0.8) to analyze the heat flux through a porous media and the flow fields. In this study, it obtained that the micropolar model reduces the heat and mass transfer rates. The adding of nanoparticles favorites the flow fields. Moreover, the enhancement of Darcy and Rayleigh numbers increases the flow intensity, the three-dimensional character, and the Nusselt and Sherwood number's value. Furthermore, the increase of Darcy number results to an enhancement on convective heat and mass transfer effects. It is found an increase about 57.57% of Nusselt number and 48.62% of Sherwood number when Darcy number increases from 10–3 to Da = 10–1. Also, results show that the variation of the buoyancy fraction induces a variation in velocities profiles.
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