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Numerical Study of MHD Mixed Convection of Nanofluid Flow in a Double Lid Convergent Cavity Cover

Numerical Study of MHD Mixed Convection of Nanofluid Flow in a Double Lid Convergent Cavity

Acta Mechanica et Automatica
Volume 19 (2025): Issue 2 (June 2025)
By: Bouchmel MLIKI,  Mokhtar FERHI and  Mohamed Ammar ABBASSI  
Open Access
|Jun 2025

Figures & Tables

Fig. 1.

Geometry of the problem
Geometry of the problem

Fig. 2.

Direction of streaming velocities, D2Q9
Direction of streaming velocities, D2Q9

Fig. 3.

Direction of streaming velocities, D2Q4
Direction of streaming velocities, D2Q4

Fig. 4.

Comparison of the local Nusselt number along the hot wall between the present results and numerical results by Lai and Yang [34]
Comparison of the local Nusselt number along the hot wall between the present results and numerical results by Lai and Yang [34]

Fig. 5.

Comparison of the temperature on axial midline between the present results and numerical results by Ghassemi et al. [35] (ϕ =3.10-2, Ra=105)
Comparison of the temperature on axial midline between the present results and numerical results by Ghassemi et al. [35] (ϕ =3.10-2, Ra=105)

Fig. 6.

a) Horizontal component of velocity b) vertical component of velocity with those of Talebi et al. [36]
a) Horizontal component of velocity b) vertical component of velocity with those of Talebi et al. [36]

Fig.7.

Streamlines, Isotherms and Entropy generation lines for different Re at Ri=20, Ha=0, and ϕ= 4.10-2
Streamlines, Isotherms and Entropy generation lines for different Re at Ri=20, Ha=0, and ϕ= 4.10-2

Fig.8.

Average Nusselt number for different values of the Reynolds numbers and volumetric fraction of nanoparticles (ϕ) at Ri=20, Re=100 and Ha=0
Average Nusselt number for different values of the Reynolds numbers and volumetric fraction of nanoparticles (ϕ) at Ri=20, Re=100 and Ha=0

Fig.9.

Total entropy generation for different values of the Reynolds numbers and volumetric fraction of nanoparticles (ϕ) at Ri=20, Re=100 and Ha=0
Total entropy generation for different values of the Reynolds numbers and volumetric fraction of nanoparticles (ϕ) at Ri=20, Re=100 and Ha=0

Fig.10.

Profiles of the dimensionless temperature in the middle of the thermally convergent cavity y/L = 0. 5 for different Reynolds numbers at Ri=20, Ha=0 and ϕ= 4.10-2
Profiles of the dimensionless temperature in the middle of the thermally convergent cavity y/L = 0. 5 for different Reynolds numbers at Ri=20, Ha=0 and ϕ= 4.10-2

Fig.11.

Profiles of the dimensionless temperature in the middle of the thermally convergent cavity x/L = 0.75 for different Reynolds numbers at Ri=20, Ha=0 and ϕ= 4.10-2
Profiles of the dimensionless temperature in the middle of the thermally convergent cavity x/L = 0.75 for different Reynolds numbers at Ri=20, Ha=0 and ϕ= 4.10-2

Fig. 12.

Streamlines, Isotherms and Entropy generation lines for different Ha at Re =100, Ri=20 and ϕ= 4.10-2
Streamlines, Isotherms and Entropy generation lines for different Ha at Re =100, Ri=20 and ϕ= 4.10-2

Fig. 13.

Effect of Hartmann number on average Nusselt number and on total entropy generation for different Hartmann numbers at Ri = 20, Re= 100 and ϕ= 4.10-2
Effect of Hartmann number on average Nusselt number and on total entropy generation for different Hartmann numbers at Ri = 20, Re= 100 and ϕ= 4.10-2

Fig.14.

Profiles of the dimensionless temperature in the middle of the thermally convergent cavity x/L = 0.75 for different Hartmann numbers at Ri = 20, Re= 100 and ϕ= 4.10-2
Profiles of the dimensionless temperature in the middle of the thermally convergent cavity x/L = 0.75 for different Hartmann numbers at Ri = 20, Re= 100 and ϕ= 4.10-2

Fig. 15.

Profiles of the dimensionless temperature in the middle of the thermally convergent cavity y/L = 0. 5 for different Hartmann numbers at Ri = 20, Re= 100 and ϕ= 4.10-2
Profiles of the dimensionless temperature in the middle of the thermally convergent cavity y/L = 0. 5 for different Hartmann numbers at Ri = 20, Re= 100 and ϕ= 4.10-2

Thermophysical properties of fluid and nanoparticles

Physical PropertiesFluid phase (H2O)Nanoparticle (CuO)
Cp(J/kg.K)4179385
ρ (kg/m3)997.18933
k (W/m.K)0.631401
β×10-5 (1/K)211.67
σ (Ω/m)-10.055.69 10-7

Grid independence test for Nu¯m at ϕ=4_10-2; Ha = 0

Average Nusselt number Nu¯m
Lattice sizeRe=1Re=100
50×501.76327.3423
75×752.14828.8753
100×1002.54839.6128
120×1202.5502 (0.07%)9.6412 (0.2%)
DOI: https://doi.org/10.2478/ama-2025-0029 | Journal eISSN: 2300-5319 | Journal ISSN: 1898-4088
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Language: English
Page range: 232 - 242
Submitted on: Oct 19, 2024
|
Accepted on: Mar 24, 2025
|
Published on: Jun 6, 2025
Published by: Bialystok University of Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
mixed convection,
entropy generation,
nanofluid,
magnetic field,
LBM,
convergent cavity
Related subjects:
Engineering,
Electrical engineering,
Electronics,
Mechanical engineering,
Mechanics,
Bioengineering and biomedical engineering,
Biomechanics,
Civil engineering,
Environmental engineering

© 2025 Bouchmel MLIKI, Mokhtar FERHI, Mohamed Ammar ABBASSI, published by Bialystok University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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