Numerical simulation and modeling of liquid film evaporation inside axisymmetric reentrant cavities

Numerical simulation and modeling of liquid film evaporation inside axisymmetric reentrant cavities

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realistic-vibrators Evaporation of thin liquid films inside reentrant cavities occurs in several boiling processes where enhanced surfaces are utilized.In this work, evaporation from a single reentrant cavity with an additional thin channel is studied.The channel allows the backflow of liquid from the pool into the cavity during bubble growth.Direct numerical simulations were performed, showing a strong relation between flow to the film inside the cavity and bubble growth at the pore.

Additionally, a model was created with a novel modeling approach which is based on solving the Young-Laplace equation.From the model characteristic nondimensional parameters can be obtained and the influence of geometry variations on Osram PTi Gear hydrodynamics can be studied.