engleski

On Mixture Model Application in Numerical Modeling of Boiling Phenomena

In this paper, a description of the multiphase modeling approach known as mixture model, or drift-flux model, is given. The mixture model is based on conservation equations for mass, momentum and energy of a mixture of all phases present in the flow. The individual phases are assumed to be in equilibrium over small distances of space, computational cells in practical terms. In order to account for different velocities each phase in reality has, the drift velocity of the dispersed phase is introduced and solved with algebraic set of equations based on empirical data. The mixture model described in this work will be used for boiling simulations, with quenching as the final application. Therefore, the fluids of interest are water and vapour, and the model should be capable to cover a range of boiling regimes. The results of a literature survey will be used to assess the relative advantages and shortcomings of the mixture model for simulations of boiling during quenching. The steps regarding future work are given.

Multiphase flow modeling, Heat transfer, Phase change

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