Pressurinzing a Tank

i621148 · September 24, 2009, 17:39

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, 19:19

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, 12:37

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, 18:57

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.

September 24, 2009, 17:39	Pressurinzing a Tank	#1
i621148 New Member Mike Jenkins Join Date: Apr 2009 Location: Kansas City Posts: 9 Rep Power: 17	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?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
interFoam / bubbleFoam to simulate an aerated tank	Meratb	OpenFOAM Running, Solving & CFD	3	November 6, 2020 11:45
how to maintain constant presure in a tank?	JB	FLUENT	5	July 31, 2008 05:12
simulate a tank equipped with propeller inside	aloha5i	CFX	0	October 15, 2005 15:56
Settling tank	John Grimm	FLUENT	1	March 20, 2005 08:20
tank leakage	H	FLUENT	0	October 4, 2004 20:28

September 24, 2009, 19:19		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	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.

October 5, 2009, 12:37		#3
i621148 New Member Mike Jenkins Join Date: Apr 2009 Location: Kansas City Posts: 9 Rep Power: 17	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 )

October 5, 2009, 18:57		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	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.