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The model was proposed for homogeneous-heterogeneous bulk condensation in vapor-gas flow with dust particles. The feature of the model is taking into account temperature difference between gaseous phase and dust particles (with condensate on them). Calculations were carried out for mixture of D2O (vapor) and N2 (gas). The model was verified by comparison of results for the flow without dust with experimental data. Results were obtained for different values of mass fraction of dust, radius of dust particles and their initial subcooling. It was shown that there is minimal initial subcooling at which there is liquid on dust particles at nozzle outlet. This value depends on size of particles and mass fraction of dust.

The mathematical model and numerical solution of the problem relevant to the heat exchange between a droplet and a vapor-gas medium are described for different regimes of the condensation droplet growth. The effect of the heat exchange between phases on the kinetics of the condensation relaxation after supersaturation is instantaneously generated in a vapor-gas mixture is studied based on the results obtained. Cesium-argon and ethane-helium mixtures are considered, with the droplet growth regime being free molecular in the former case and varying from transient to continual in the latter case. The data obtained in terms of the general formulation of the problem and those resulting from the assumptions simplifying the behavior of droplet temperature are compared to determine the applicability domain of the aforementioned assumptions.