CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

Total pressure boundary condition

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 10, 2005, 14:41
Default Hi everybody!! I have to anal
  #1
Member
 
Muzio Grilli
Join Date: Mar 2009
Posts: 36
Rep Power: 17
maritozzo is on a distinguished road
Hi everybody!!
I have to analyze the flow through an injector, i know there is not a solver for this kind of problem but first I wonna know if at least OpenFoam has the boundary conditions i need.
I decided to set the totalPressure boundary condition on the Inlet p0=p+(1/2)rho*U^2
so I specify in the pd file at time 0:

INLET
{
type totalPressure;
p0 uniform 12000000;
}
What do I have to specify in the U file

2nd question: as the time goes the velocity at the Inlet grows and consequently I should change the value of k and epsilon so i can't specify for them a fixed value but i thaught that the new k and the new epsilon should be calculated at each time step

3rd question: I decided to use K-epsilon turbulence model but at the beginning the fluid is still so intially the flow is laminar so do I have also to switch the turbulence model

Thanks
maritozzo is offline   Reply With Quote

Old   January 29, 2011, 13:53
Default the same question
  #2
Member
 
Mohammad.R.Shetab
Join Date: Jul 2010
Posts: 49
Rep Power: 15
mrshb4 is on a distinguished road
Hi
I have the same question as your first one!!!
I think pressureInletVelocity can be used but I'm not sure about it.

Mohammadreza
mrshb4 is offline   Reply With Quote

Old   January 31, 2011, 04:03
Default
  #3
Senior Member
 
Christian Lucas
Join Date: Aug 2009
Location: Braunschweig, Germany
Posts: 202
Rep Power: 17
Chris Lucas is on a distinguished road
Hi,

for the velocity field, use the pressureInletVelocity at the inlet as stated above. For the turbulence field, you can use turbulentIntensityKineticEnergyInlet (k) and turbulentMixingLengthDissipationRateInlet (epsilon)


Regard,
Christian
Chris Lucas is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pressure Boundary condition abishek FLUENT 1 July 28, 2008 09:14
Total pressure boundary condition maritozzo OpenFOAM Running, Solving & CFD 0 December 10, 2005 13:56
Total pressure boundary condition bartold OpenFOAM Pre-Processing 0 November 7, 2005 09:45
Pressure Boundary Condition Matt Umbel Main CFD Forum 0 January 11, 2002 11:06
Pressure Boundary Condition chiseung FLUENT 1 June 19, 2001 22:05


All times are GMT -4. The time now is 05:28.