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ANSYS CFX multi domain modeling

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pegus

Aerospace
Mar 18, 2015
67
Good day,

I am trying to model a bubble decompression inside a tank. This tank is half full with water and the other half is air. I have some questions regarding the set up of this problem.
The intention of the bubble has an initial pressure of 50psig and then it drops to 0 psig at 0.1 seconds. I was planning to create this variation with some expressions.
The intention of this analysis is to get the water pressure distribution on the tank walls.

1.- To start with the bottom half with water and the upper part with air, do I need to create 2 domains? or how can I specify this condition.
2.- What would be the best inlet conditions for the bubble? (pressure or velocity)?

Thanks in advance,

P.P
 
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