Simulation of mass transfer in problems of numerical study of heating of cryogenic products in a horizontal vessel

This paper considers the numerical modelling of evaporation-condensation in non-stationary heat and mass transfer in cryogenic processes. Calculating the parameters of a multi-phase turbulent flow in a closedregion when approximating the free surface by the liquid volume methodmakes it possible to track the vertical displacement of the phase boundary with changing cryoproduct parameters over time. A description of evaporation-condensation models suitable for use in non-stationary calculations of flows in a closedregion together with the liquid volume method aregiven. The possibility of using the Leeevaporation-condensation model and the model based on particle diffusion isdemonstrated using calculations on simple computational grids. The change in the pressure of a cryogenic product during non-drainage storageusing various models of boiling-condensation are presented. The simulation resultswere used in a database of storage parameters in a system for the remotemonitoring of cryogenic equipment. The data are estimated storage times fordifferent reference pressures and liquid levels in the vessel, with each external heat flux valuehaving a specific estimated non-drainage storage time.