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Gas discharge from tank to tank through a pipe

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Old   April 4, 2008, 09:06
Default Gas discharge from tank to tank through a pipe
  #1
Arno
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Hello,

my preliminary goal is to model the gaseous discharge of a high-pressure vessel to a low-pressure one through a thin long pipe.

The system is closed. I can't figure out how to "open the valve" at t = 0 between the high-pressure tank and the pipe. Is it an initial condition? It seems it can't be a boundary condition since I have adjacent cells around this interface (hp vessel at one side, pipe at another).

Would be pleased to get a tip for this simple (I guess) case. Thank you folks.
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Old   April 7, 2008, 13:17
Default Re: Gas discharge from tank to tank through a pipe
  #2
Sasha
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Hi, You could use "patch" as an alternative initialization procedure: first initialize the whole domain to, say, high pressure, and then patch a low pressure on the low pressure part of the domain. Then run the calcs. Hope it helps.
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Old   September 27, 2010, 02:49
Default solution openning valve
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andres
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hi friend,
I have the solution of your problem... I know is two years later but, if you already need how to open a valve, I can give you a UDF code

hugs
Quote:
Originally Posted by Arno
;149678
Hello,

my preliminary goal is to model the gaseous discharge of a high-pressure vessel to a low-pressure one through a thin long pipe.

The system is closed. I can't figure out how to "open the valve" at t = 0 between the high-pressure tank and the pipe. Is it an initial condition? It seems it can't be a boundary condition since I have adjacent cells around this interface (hp vessel at one side, pipe at another).

Would be pleased to get a tip for this simple (I guess) case. Thank you folks.
cfdhydraulic is offline   Reply With Quote

Old   December 25, 2010, 08:05
Default UDF code
  #4
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Raja
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Quote:
Originally Posted by cfdhydraulic View Post
hi friend,
I have the solution of your problem... I know is two years later but, if you already need how to open a valve, I can give you a UDF code

hugs
Hi CFDHydraulic
merry christmas and a happy new year
I need to UDF code
If possible please, send me.
Best regards,
Raja Swata
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Old   December 28, 2010, 10:52
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elahe
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Hi, I need that udf too mate, can u plz send me? thanks in advance.
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