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A three dimensional simulation of spray cooling and its evaporating liquid film generated on patterned surfaces

Zeraatkardevin, A ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijmultiphaseflow.2022.104174
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. Liquid impingement cooling in the form of jet or spray is an appropriate method to remove heat from small surfaces progressively utilized in industry. In this study, numerical simulations are conducted to investigate the effect of surface structure on heat transfer characteristics. Five different three-dimensional structured surfaces are investigated using Euler-Lagrangian approach. The effect of surface structures is discussed on the liquid film thickness, the liquid film velocity, and the heat flux with its uniformity for a given spray and temperature characteristics. The results show that the convective heat transfer strongly depends on both liquid film thickness and velocity. While the liquid film thickness always grows in the grooved surfaces, its velocity depends on the form and direction of the fins. The averaged values of the film thickness and velocity magnitude are almost independent of the surface temperature. Among the investigated surfaces, the parallel and circular patterns showed the best and worst performance on heat transfer characteristics, respectively. © 2022 Elsevier Ltd
  6. Keywords:
  7. Numerical simulation ; Spray cooling ; Structured surfaces ; Film cooling ; Film thickness ; Heat convection ; Lagrange multipliers ; Liquid films ; Numerical models ; Spray steelmaking ; Surface structure ; Velocity ; Euler-Lagrangian ; Evaporating liquid film ; Film velocity ; Heat-transfer characteristics ; Impingement cooling ; Liquid film thickness ; Patterned surface ; Spray-cooling ; Structured surfaces ; Three dimensional simulations ; Heat flux
  8. Source: International Journal of Multiphase Flow ; Volume 155 , 2022 ; 03019322 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0301932222001598