CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Pre-Processing

Boundary Condition Total Pressure for Beginners

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

LinkBack Thread Tools Search this Thread Display Modes
Old   August 26, 2020, 09:16
Lightbulb Boundary Condition Total Pressure for Beginners
SimonStar's Avatar
Join Date: Sep 2019
Location: Germany
Posts: 52
Rep Power: 3
SimonStar is on a distinguished road

In my simulation the outlet-boundary is like this:
        type            totalPressure;
        uniform     0;
        p0         0;
So it is athmospheric pressure at the outlet.

What if I rather want to have the same pressure outlet with 100 Pa instead of atmospheric pressure?

Is it true that the
uniform 0;
describes the initial pressure at t=0 and
p0  0;
describes the pressure at the outlet duiring the simulation?

If no, what are they standing for?

Thank you
SimonStar is offline   Reply With Quote

Old   August 26, 2020, 13:56
Thiago Parente Lima
Join Date: Sep 2011
Location: Diamantina, Brazil.
Posts: 53
Rep Power: 11
thiagopl is on a distinguished road
Hi Simon,

I think this link may help you.
p0 uniform 0;
means that you are setting the value of 0 uniformly at your boundary patch (zero at the whole boundary patch). The solver will use this value and the velocity at this boundary to calculate the static pressure, as the equation in the link describes.

Fields of interest: Heat transfer; Convection heat transfer; Conjugate heat transfer.
thiagopl is offline   Reply With Quote


boundary, condition, totalpressure

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
Centrifugal fan-reverse flow in outlet lesds to a mass in flow field xiexing CFX 3 March 29, 2017 10:00
What velocity Boundary condition to use With Total Temperature and Pressure pupo OpenFOAM Running, Solving & CFD 0 June 10, 2016 10:20
Time dependant pressure boundary condition yosuke1984 OpenFOAM Verification & Validation 3 May 6, 2015 06:16
Radiation interface hinca CFX 15 January 26, 2014 17:11
Convective Heat Transfer - Heat Exchanger Mark CFX 6 November 15, 2004 15:55

All times are GMT -4. The time now is 04:56.