Can Aspen Dynamic or HYSYS be used to simulate the process of liquid and gas venting from a tank? ?

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RT, I currently want to know how to use Aspen Dynamic or HYSYS to determine the time-dependent distribution of the effluents from gas-liquid stripping. With the geometric properties known, as well as those of the holdup tank, we now want to simulate its emptying process. The first step is to stop feeding material; first, the liquid is drained, and after that, the gas is removed. Finally, the process is brought to an end with nitrogen purging. But I’m not sure what modules Aspen Dynamic offers to assist with this process. Another question is: when draining the liquid, is it necessary to supply a certain amount of inert gas to maintain pressure? Otherwise, as the liquid level drops, the gas inside the container should expand, leading to a decrease in pressure. Relief valves can perhaps be used for gas drainage, but what should be used for liquid drainage? Learn from everyone!*