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Numerical simulation of MHD mixed convection flow of Al2O3–water nanofluid over two hot obstacles

Hosseini Abadshapoori, M ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1002/htj.22446
  3. Publisher: John Wiley and Sons Inc , 2022
  4. Abstract:
  5. The problem of cooling two hot blocks in a novel geometry using magnetohydrodynamic flow of Al2O3–water nanofluid has been studied utilizing a D2Q9 Lattice Boltzmann Model. While the Hartmann number (Ha) takes 0, 50, or 100 values, the Richardson number (Ri) varies between 0.02 and 20. Four variations of the geometry are selected. The gravity angle is set to be either (Formula presented.), (Formula presented.), or (Formula presented.). Results reveal that the Nusselt number (Nu) increases as Ri increases for all cases. Furthermore, the Hartmann number has a deteriorating effect on the Nusselt number except for low Ri numbers. In addition, the results indicate that while the geometrical configuration is having a considerable impact on the average Nusselt number at low and high Richardson numbers, it has a negligible effect at the mixed convection flow. The best angle for the gravitational force is also between 0 and (Formula presented.). A new correlation for the Nu number based on all parameters is also presented. © 2022 Wiley Periodicals LLC
  6. Keywords:
  7. Hartmann number ; LBM ; Nanofluid ; Richardson number ; Alumina ; Aluminum oxide ; Geometry ; Magnetohydrodynamics ; Mixed convection ; Nanofluidics ; Geometrical configurations ; Gravitational forces ; Hartmann numbers ; Hot block ; Lattice-Boltzmann model ; Magnetohydrodynamics flows ; Mixed convection flow ; New correlations ; Water nanofluids ; Nusselt number
  8. Source: Heat Transfer ; Volume 51, Issue 4 , 2022 , Pages 3237-3256 ; 26884534 (ISSN)
  9. URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/htj.22446