Quote Originally Posted by driftshade View Post
backgroud:
i choose the PHAST 6.53 to calculate the initial leak rate,‘leak model' for hole size of 6.35mm and 25mm,and long pipeline for 100mm,300mm,
but the inintial leak rate for large leak and rupure is very high,far bigger than 55.89kg/s, if i take the value ,the release inventory is so large,i think there's must be some problem,but i don't know why?
sure is too late for my reply, but maybe a suggestion for others.

For my opinion the difference could have been the use in PHAST of long pipeline model instead of a leak model from vessel: when use large hole sizes with long pipeline you should find about twice the expected rate since the leak occur from both left and right breaches in the pipeline.
If your release starts from an isolated condition then a transient modelling could be well modelled with leak from vessel.

I'm interested in this topic: driftshade, could you post the solution you found for your problem and your explanation?