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Velocity and Pressure boundary setup

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Old   March 31, 2010, 11:08
Default Velocity and Pressure boundary setup
  #1
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trackeras
Join Date: Apr 2009
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Hi, Foamers

I want to simulation turbulent flow combustion using reactingFoam

It has 2 inlet & 1 outlet.

Basically, It is partially-premixed combustion

inlet 1 : CH4 + Air
inlet 2 : Air

I have some problems about P and U boundary condition setup.

Known information (attached below)

U of inlet 1 and 2

P of outlet

Current my boundary setup

boundaryField --------------------->> "U"
{
inle_1
{
type fixedValue;
value uniform (-20 0 0);
inle_2
{
type fixedValue;
value uniform (-20 0 0);
}
wall_3
{
type fixedValue;
value uniform (0 0 0);
}
outl_4
{
type zeroGradient;
}
}

boundaryField --------------------->> "P"
{
inle_1
{
type zeroGradient;
}
inle_2
{
type zeroGradient;
}
wall_3
{
type zeroGradient;
}
outl_4
{
type fixedValue;
value uniform 100000;
}
}


When I run my case using this boundary set, I can see inflow at outlet.
(The calculated pressure of my domain is lower than outlet boundary pressure.
I don't know how It can happen.)

Is there anybody who knows appropriate boundary conditions?
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Old   May 18, 2010, 09:19
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mediode
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Try

outl_4
{
type fixedValue;
value uniform 0;
}
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