A Vaporization Model for Computational Fluid Dynamics Simulations - Application to Film Boiling

EasyChair Preprint 5261

Abstract

In addition to the challenges of multiphase flow simulation, vaporization phenomena involve important discontinuities of velocity and temperature gradients at the interface. These jumps are crucial to properly tackle the hydrodynamics and thermodynamics of boiling. In this work, we focus on the velocity jump that is computed within a Continuous Surface Force Approach along with a Level Set method. After presenting the model, two benchmarks are presented to validate the efficiency of the method to model the hydrodynamics of film boiling. Comparison is made between the simulations and experimental observations, showing that a laminar approach enable to capture the main features of a vertical film boiling. Then, this method is enriched with a thermal model working in saturated conditions. This complete formulation is used to investigate a 2D film boiling benchmark, validating at the same time the method.

Keyphrases: Computational Fluid Dynamics, Continuous Surface Force, finite element method, multiphase flow, phase change

@booklet{EasyChair:5261,
  author    = {Charles Brissot and Rudy Valette and Elie Hachem},
  title     = {A Vaporization Model for Computational Fluid Dynamics Simulations - Application to Film Boiling},
  howpublished = {EasyChair Preprint 5261},
  year      = {EasyChair, 2021}}