Numerical analysis of double-diffusive natural convective flow of Ostwald-de Waele fluid in an irregular enclosure with a circular obstacle
Purpose: The current study aims to enhance the double diffusive natural convection in an Ostwald-de Waele fluid filled in a hexagonal enclosures using non-uniform magnetic field embedded with circular obstacle. The upper wall has maximum temperature Th∗ and concentration (Ch∗) whereas the lower wall...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379723011051 |
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| author | Muhammad Aqib Aslam Hailou Yao Mohammed K. Al Mesfer Hasan Shahzad Mohd Danish Kashif Irshad |
| author_facet | Muhammad Aqib Aslam Hailou Yao Mohammed K. Al Mesfer Hasan Shahzad Mohd Danish Kashif Irshad |
| author_sort | Muhammad Aqib Aslam |
| collection | DOAJ |
| description | Purpose: The current study aims to enhance the double diffusive natural convection in an Ostwald-de Waele fluid filled in a hexagonal enclosures using non-uniform magnetic field embedded with circular obstacle. The upper wall has maximum temperature Th∗ and concentration (Ch∗) whereas the lower wall is kept at minimum temperature Tc∗ and concentration Cc∗. The parameters that play a significant role in the heat and mass transfer are evaluated, including Hartmann number, power law index, Rayleigh number and buoyancy ratio. Design/Methodology/approach: In two-dimensions, the governing formulation is written as a set of balancing equations for velocities, pressures, energies and concentrations. The nonlinear governing PDEs are solved using numerical approach based on Finite Element Method (FEM). The discretization is performed using the stable finite element pair ℘2/℘1. Code validation and results are ensured by conducting a grid convergence and comparison test respectively. Findings: The influence of flow on velocity, isotherms and iso-concentration field is examined by analyzing a broad variety of variables such as power-law index 0.7≤n≤1.2, Hartmann number 0≤Ha≤50, Rayleigh number 104≤Ra≤106, inclination angle 0°≤γ≤90° and buoyancy ratio -2≤N≤2. The findings are displayed graphically, including the flow, temperature and concentration fields. Heat and mass transfer rates are maximum for shear thinning fluids while for shear thickening fluids it reduces, whereas it is maximum for concentration dominated assistant flow and minimum for concentration dominant counter flow. Application: The novel aspects of the research include its thorough examination of solar thermal power conversion and its inventive energy deficiency devices and a wide range of electrical design applications. |
| first_indexed | 2024-03-08T12:52:08Z |
| format | Article |
| id | doaj.art-3119ea673772442eaf454a45fc58b505 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-03-08T12:52:08Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-3119ea673772442eaf454a45fc58b5052024-01-20T04:45:25ZengElsevierResults in Physics2211-37972024-01-0156107312Numerical analysis of double-diffusive natural convective flow of Ostwald-de Waele fluid in an irregular enclosure with a circular obstacleMuhammad Aqib Aslam0Hailou Yao1Mohammed K. Al Mesfer2Hasan Shahzad3Mohd Danish4Kashif Irshad5Department of Mathematics, Faculty of Science, Beijing University of Technology, Beijing 100124, ChinaDepartment of Mathematics, Faculty of Science, Beijing University of Technology, Beijing 100124, ChinaChemical Engineering Department, College of Engineering, King Khalid University, Abha, Saudi ArabiaFaculty of Energy and Power Engineering, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, China; Department of Chemical Engineering and Energy Technology, University of Science and Technology, China; Corresponding author.Chemical Engineering Department, College of Engineering, King Khalid University, Abha, Saudi ArabiaInterdisciplinary Research Centre for Sustainable Energy Systems (IRC-SES), Research Institute, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi ArabiaPurpose: The current study aims to enhance the double diffusive natural convection in an Ostwald-de Waele fluid filled in a hexagonal enclosures using non-uniform magnetic field embedded with circular obstacle. The upper wall has maximum temperature Th∗ and concentration (Ch∗) whereas the lower wall is kept at minimum temperature Tc∗ and concentration Cc∗. The parameters that play a significant role in the heat and mass transfer are evaluated, including Hartmann number, power law index, Rayleigh number and buoyancy ratio. Design/Methodology/approach: In two-dimensions, the governing formulation is written as a set of balancing equations for velocities, pressures, energies and concentrations. The nonlinear governing PDEs are solved using numerical approach based on Finite Element Method (FEM). The discretization is performed using the stable finite element pair ℘2/℘1. Code validation and results are ensured by conducting a grid convergence and comparison test respectively. Findings: The influence of flow on velocity, isotherms and iso-concentration field is examined by analyzing a broad variety of variables such as power-law index 0.7≤n≤1.2, Hartmann number 0≤Ha≤50, Rayleigh number 104≤Ra≤106, inclination angle 0°≤γ≤90° and buoyancy ratio -2≤N≤2. The findings are displayed graphically, including the flow, temperature and concentration fields. Heat and mass transfer rates are maximum for shear thinning fluids while for shear thickening fluids it reduces, whereas it is maximum for concentration dominated assistant flow and minimum for concentration dominant counter flow. Application: The novel aspects of the research include its thorough examination of solar thermal power conversion and its inventive energy deficiency devices and a wide range of electrical design applications.http://www.sciencedirect.com/science/article/pii/S2211379723011051CFD simulationDouble diffusivenon-Newtonian fluidMHDHybrid mesh |
| spellingShingle | Muhammad Aqib Aslam Hailou Yao Mohammed K. Al Mesfer Hasan Shahzad Mohd Danish Kashif Irshad Numerical analysis of double-diffusive natural convective flow of Ostwald-de Waele fluid in an irregular enclosure with a circular obstacle Results in Physics CFD simulation Double diffusive non-Newtonian fluid MHD Hybrid mesh |
| title | Numerical analysis of double-diffusive natural convective flow of Ostwald-de Waele fluid in an irregular enclosure with a circular obstacle |
| title_full | Numerical analysis of double-diffusive natural convective flow of Ostwald-de Waele fluid in an irregular enclosure with a circular obstacle |
| title_fullStr | Numerical analysis of double-diffusive natural convective flow of Ostwald-de Waele fluid in an irregular enclosure with a circular obstacle |
| title_full_unstemmed | Numerical analysis of double-diffusive natural convective flow of Ostwald-de Waele fluid in an irregular enclosure with a circular obstacle |
| title_short | Numerical analysis of double-diffusive natural convective flow of Ostwald-de Waele fluid in an irregular enclosure with a circular obstacle |
| title_sort | numerical analysis of double diffusive natural convective flow of ostwald de waele fluid in an irregular enclosure with a circular obstacle |
| topic | CFD simulation Double diffusive non-Newtonian fluid MHD Hybrid mesh |
| url | http://www.sciencedirect.com/science/article/pii/S2211379723011051 |
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