Objectives. Ways to prevent the onset of rollover in the liquefied natural gas storage.Method. The article deals with modern methods of mathematical modeling and software when solving problems in a nonlinear formulation. A regulatory analysis of existing methods of LNG transportation has been carried out.Result. Using the mathematical program ANSYS, the rollover process in the liquefied natural gas storage was modeled. In the ANSYS software package, 3d modeling of the process of heat and mass transfer of the stratified liquid in the liquefied natural gas storage was performed. When simulating a rollover phenomenon, the time to its occurrence was 30 minutes, which differs from the experimental value by 1.7%. Based on the results of the calculations, it can be determined that the time to the onset of rollover depends on the concentration of the component layers, on the filling and geometry of the reservoir. These factors lead to an increase in evaporation of liquefied natural gas of 0.04%.Conclusion. The method of numerical experiment allows to determine the distribution of pressure, temperature, density, concentration in the object under study, without resorting to real experiments. The use of the ANSYS software package of computational fluid dynamics in the process of heat and mass transfer of the stratified liquid in the liquefied natural gas storage is necessary when calculating the increased accuracy.
Optimization based on the Adjoint method for adsorbed natural gas storage systems.
