Here is my problem. I have to simulate the pressure increase in a methan tank. In fact, at the beginning, tank is fulfilled with liquid methan at low temperature. When the liquid methan will heat up du to external conditions, it will transform in gaz so that the pressure will increase in the tank. I know that liquid/gaz phase change is not supported by Simcenter Thermal & Flow but do you know an approach with adequate assumptions which could help me to resolve this problem ?