Computations of Boiling Flows

A numerical method to simulate liquid-vapor phase change is presented. The method is based on the so-called single eld formulation where one set of equations for conservation of mass, momentum, and energy are written for the entire ow eld. Interfacial source terms for surface tension, interphase mass transfer and latent heat are added as delta functions that are non-zero only at the phase boundary. The equations are discretized by a nite di erence method on a regular grid and the phase boundary is explicitly tracked by a moving front. A comparison of numerical results to the exact solution of a one-dimensional test problem shows excellent agreement. The method is applied to lm boiling, where vapor bubbles are generated from a thin lm next to a hot wall. Although the lm boiling simulations presented here are two-dimensional, the resulting heat transfer rate and wall temperatures are found to be in good agreement with experimental observations.