Hi, what does the lInf paramet
 

Hi, what does the lInf parameter mean in pressureTransmissive b.c.?
For instance:
outlet
{
type pressureTransmissive;
pInf 515000;
lInf 1;
value uniform 515000;
}
Is it the length to the place where pInf is extrapolated from? In this case, in what units is the length given? If I used a
convertToMeters 0.0635;
in my blockMeshDict, does this b.c. see this conversion or do I have to make sure myself that it has the correct value? All in all what does this lInf mean?
best regards

lInf is the relaxation length-
 

lInf is the relaxation length-scale (in m) for outgoing pressure waves to return to pInf. This stops the pressure in the domain floating about it the inlet pressure is not specified.