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-   -   Pressurinzing a Tank (https://www.cfd-online.com/Forums/cfx/68590-pressurinzing-tank.html)

i621148 September 24, 2009 18:39

Pressurinzing a Tank
 
What is the best way to simulate pressurizing a tank?
Should I put 125 psi on the inlet and then how to specify what else happens (as there are no other conditions except inlet and openings)?

I could put initially 14.7 psi on all the walls somehow?

ghorrocks September 24, 2009 20:19

Assuming you are pressurising a closed tank then, yes, put the high pressure on the inlet and give it an initial condition of your starting pressure. Obviously it will need to be a transient simulation.

You do not define pressure on walls, that is not physically real.

i621148 October 5, 2009 13:37

For Details of Global Initialisation:
Do I need to run some type of pre-analysis in the inlet to determine the
Velocity Components? Transient analysis will not run without having some value other than 0 within U V & W so I put some placeholder value (100 m/s) to see the analysis process and still got no flow into the tank.

I have not run a Transient analysis before and the details for setting all the option boxes are quite scarce under the help files.

(Also I noticed that in true engineering fashion, I have mis spelled the title of the post :) )

ghorrocks October 5, 2009 19:57

CFX allows the initial condition to be 0m/s velocity. If the initial condition is zero velocity then put in 0m/s as the initial condition.


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