I need to size a slug catcher based on the slugs that will be generated through a 70 km 12 inch diameter pipeline which comprises mostly light gas and water. Hysys steady state simulations show slugs of 40-80 m along the length of the pipe. I am trying to estimate the slug catcher volume by computing the volume of the longest slug. Is this the correct way of calculating slug catcher volume? Or I need to add up all slug volumes along the pipe to determine slug catcher size.
Additionally, steady state simulations are not good for estimating pigging slugs and turn-up slugs. what is the closest i can get with steady state simulation results?