# simple geometry and potentialFoam?

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June 21, 2012, 16:39
simple geometry and potentialFoam?
#1
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Tobias Holzmann
Join Date: Oct 2010
Location: Leoben (Austria)
Posts: 1,801
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Hi all,

I have a problem with my project. I wanna make a combustion simulation with the flamelet solver but the solver is not working (no convergence - break down). So after that I decided to try it with the rhoSimpleFoam to get the flow field for the flamlet solver.

Here the solver is still not running and I wanted to initialise the field with the potentialFoam but there are just uncorrect physical solutions (U > 1e6). Well I changed the geometry and simplifyed it till I reached a simple pipe (picture).

But I cant initialise it with the potentialFoam and now i am wondering why?
Its for my masterthesis and I am working on that problem since last friday. I thought there is a problem with my OF version or sth like that on my workstation but at home there is the same problem.

Do someone have some ideas?
potentialFoam can initialise the rhoSimplecFoam tutorial so it should be possible to initialise that simple pipe.

Here my bc for U

Code:
```dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{
inlet
{
type            flowRateInletVelocity;
flowRate        constant 0.002;
value           uniform (0 -0 0.389333);
}
outlet
{
type            inletOutlet;
inletValue      uniform (0 0 0);
value           uniform (0 0 0);
}
wall
{
type            fixedValue;
value           uniform (0 0 0);
}
}```
For p
Code:
```dimensions      [0 2 -2 0 0 0 0];

internalField   uniform 1e5;

boundaryField
{
outlet
{
type            fixedValue;
value         uniform 1e5;
}

inlet
{
type            mixed;
refValue        uniform 1e5;
valueFraction   uniform 0.3;
}

wall
{
}```

Hope for some help.
Tobi

PS: I solved complex 2phase simulations and now I am not able to solve that problem. I do not know if I should cry or laugh about that situation
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