What kind of unbalanced forces are expected on elbows during start up of a liquid line?
I am aware of the forces due to change of momentum, that evetually balance out as the flow is established.
If a four way valve is suddenly opened and flow is established in the alternate path. are the elbows going to see any deltaP times A forces, even for a short duration? How to asses if there will be a unbalanced pressure load i.e if any pressure differential will exist between elbow pairs during start up?
Any suggesstion, guidance, formulae will be appreciated.
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somnath