In this Paper, the lattice Boltzmann method (LBM) is adopted to simulate bubble dynamics and heat transfer characteristics along inclined structured surfaces in subcooled boiling. First, the growth of the bubble in the liquid without consideration of gravity is simulated to validate the selected LBM multiphase model. Then, the current research is concerned with the bubble motion and its thermodynamic behavior on the inclined structured surface. Particularly, the effects of inclination angle and surface geometry are explored. Next, the simulation is performed at the surface with inclination angles of 50, 60, and 70 deg to the horizontal. In general, it is easier for the bubble to escape from the concave as the inclination angle is increased. At the same time, the heat transfer coefficient increases as the inclination angle increases. Moreover, in terms of the semicircle structure, trapezoid structure, rectangular structure, and inverted trapezoid structure, it has been found that the rectangular structured surface is advantageous to the bubble motion and surface heat transfer when the inclination angle is 60 deg. Numerical results demonstrate that the heat transfer efficiency is relevant to both the inclination angle and surface geometry.
Numerical Simulation of Bubble Dynamics in Subcooled Boiling Along Inclined Structured Surface
Journal of Thermophysics and Heat Transfer ; 35 , 1 ; 16-27
2020-05-20
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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