Dynamic analysis & 2-phase flow 2

[KLee777]

I'm new to dynamic modeling in Caesar II, so please bear with me.

I'm analyzing a gas hydrotreater on which the heater feed piping is vibrating. (A little background: Hydrogen gas is dumped into the gas oil prior to a series of interchangers. After the interchangers, the 2-phase mixture is fed into the heater.)

Our client wanted not only a static analysis to resolve issues with the pipe supports, but also a 2-phase flow analysis and a dynamic analysis.

Our process guys indicate that the predicted 2-phase flow regime is not the cause of the vibration. So, I am having to do a dynamic analysis in Caesar II to try to find out what's causing it.

My question is, if all I have are flow velocities, pressure drop, and pipe and fluid properties, is this enough information to complete a dynamic analysis in Caesar II?

I should note that we do not have slug flow (it's annular-dispersed), and no occasional shock loads (i.e., no quick-closing valves, no wind loads, no vibrating equipment, etc). I'm also curious to know just what Caesar's capabilities are, and will my static analysis (placement/type of supports) be affected by the outcome of the dynamic analysis?

Thanks in advance for your help.

 

[NozzleTwister]

KLee777,

Although this forum is great, you'll probably get more response by also posting this on COADE's CAESAR II forum.

I've attached the link below.

http://www.coade.com/support_discussion.asp

Good luck,


NozzleTwister
Houston, Texas