Isogeometric Phase-field Simulation of Boiling
TEXAS UNIV AT AUSTIN AUSTIN United States
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In this work we consider the Navier-Stokes-Korteweg equations, a diffuse interface model describing liquid-vapor phase transitions. A numerical scheme for this model is constructed based on functional entropy variables and a new time integration concept. The fully discrete scheme is unconditionally stable in entropy and second-order time-accurate. Isogeometric analysis is utilized for spatial discretization. The boiling problem is numerically investigated by making proper assumptions on transport parameters and boundary conditions. Compared with traditional multiphase solvers, the dependence on empirical data is significantly reduced, and this modeling approach provides a unified predictive tool for both nucleate and film boiling. Both two- and three-dimensional simulation results are provided.
- Numerical Mathematics