In this article, a fixed-grid finite volume approach to simulate the convection-dominated solidification/melting process is presented. An Eulerian multi–fluid modeling approach is employed to track the phase change interface by obtaining solutions to governing volume fraction, momentum and energy transport equations. The liquid-solid interfacial phase transfer effects are modeled using a novel mass transfer function incorporating the latent heat modification due to the phase change process. The alterations in the local phasic fractions and the resultant cellular latent heat is correctly realized using a source term approach within a homogeneous enthalpy modeling framework. The model fully implemented within the commercial CFD code AVL FIRE® V2010 is tested and validated using a (1) classical 1D Stefan’s problem (2) melting of gallium (3) tin solidification scenario. In addition to the mass, momentum and energy solutions, transport of species within multi-component liquids is made possible, thereby allowing means for efficient and accurate coupling between the temperature and concentration fields within the system. Description of the phase change fronts, the local velocity and temperature fields are discussed in detail. Results from the simulations are compared against experimental data wherever available. Discussions pertaining to the applicability of the model and its robustness are elaborated within the article.
A tabulated real-fluid modeling approach applied to cryogenic LN2-H2 jets evaporation and mixing at transcritical regime
