Dear all,
Which one is more conservative or more likely to happened when pump is being start up and filled and empty pipe ?
There is two phenomena that will happened: 1. Slug Flow
2. Surge
I am trying to simulate it using Bossfluid, and when i consider both two phenomena happened, the unbalanced forced causes by this condition is to big, but if i only considered only slug flow then the load is not to big.

With system as i attached before, the unbalanced force causes by Slug and surge event at the first elbow is 67203 N. But if i only considered slug then the load at the first elbow is 264 N.

If i perform stress analysis using value from Slug+Surge pressure, i will ended up with some anchor and snubber in then system.
But if i only use the slug case alone then, my previuos configuration are still safe.

So, if any of you have several experience with pump start up filling empty pipe or maybe firewater pump start up, please share your experience, which phenomena is likely more to occur? Slug flow + Surge or just Slug Flow?
Thanks.

Rgrds
TS