how to set the BCs on a very low pressure reactor
 

Hey, everyone, I'm new to the OpenFOAM and I met some difficult problems.

I'm working on a very low pressure reactor by using the reactingFoam.
Since the reactor works on a 190Pa pressure and 1700K and it has a very very thin injector,
I calculated that the inlet velocity becomes about 1400m/s:(
After I tried this value(disables all reactions), it diverged soon:(

So I think that may be you can give me some advise on this case:)

Now I set the pressure BCs as
outlet
{
type fixedValue;
value uniform 190;
}

inlet01
{
type fixedValue;
value uniform 190;
}

and I set velocity BCs as
outlet
{
type inletOutlet;
value $internalField;
inletValue uniform ( 0 0 0 );
}

inlet01
{
type fixedValue;
value uniform (0 1339 0);
}

Besides, can reactingFoam handle such a low pressure case? Or should I choose other solvers?:confused:

Thank you! Hope for the helps:)