[j91]

Hi,

I have a question about the size of relaxation zones used in waves2foam. Typically I see recommendations of "about a wavelength" as a recommended length for the inlet zone and outlet zone (each), but why is this the case? What kind of error do you run into if you shrink the relaxation zones to be much smaller, say 50% or 10% or even 1% of a wavelength? How drastic are the effects if you approach the equivalent of a boundary inlet/outlet and try to make a relaxation "zone" just a few cells long? (I think OLAFOAM has a generation system a little like this, although using the boundary itself?)

Thanks in advance for your time. I have looked around in literature but it's difficult to find practicalities like this, especially as people tend to publish what works rather than what breaks.