Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

A new one-dimensional model suitable for practically orientated simulations of transient multiphase flows within vessels was developed. The model bases on a new developed specific Particle-In-Cell method. The equations of transport are solved free of numerical diffusion. This property and the distinction between continuous and dispersed phases make an implicit reflection of discontinuities as e.g. the top level of the mixture possible. Flexible interfaces allow a convenient coupling of this model with constitutive correlations and models for special phenomena. There is also an interface, which enables the implementation of foam models. By such a model the generation decay of foam at the top level of the mixture may be simulated. A special goal of the code is the transient simulation of emergency relief from chemical reactors. For this reason the code was equipped with models for pressure calculation, conservation of energy, phase transfer, bubble generation, bubble growth, coalescence, drift of the phases, heat release from the vessel wall, discharge and homogeneous chemical reactions.