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Modeling a closed vessel pre-stressed by its internal fluid

Posted 25.11.2013, 14:30 GMT-5 Fluid & Heat, Structural Mechanics Version 4.3, Version 4.3b 0 Replies

Cheng Xi
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Hi,

I am trying to model the dynamic deformation of a vessel which contains incompressible fluid (fully encapsulated) under external load. At the initial state, the fluid has internal pressure such that the vessel is pre-stressed. I wanted to model this in the fluid-structure interaction module from COMSOL but not sure how to handle the pre-stress. The main difficulty that I have is that the system is closed and I am not sure how to manipulate the fluid. I could add an initial compression on the structure such that the fluid-pressure is raised, but this may not be the physical picture I am looking at as the vessel is stretched by the fluid in reality.

Please kindly advice me how to model such a prestressed system appropriately, any help is very much appreciated!

Thanks,

Xi
0 Replies Last Post 25.11.2013, 14:30 GMT-5
COMSOL Moderator

Hello Cheng Xi

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