Hello to all.
I am trying to accurately simulate fluid flow through a "real" pipe fitting and surface roughness is part of that.
I am given from the pipe manufacturer a single value for roughness of different pipes in dimensions of distance. i.e 0.0028 inches.
I see that there are several options for surface roughness of materials but units are now shown which complicates matters since there is more than one value I can enter. Where do I go to get full definitions and units of these input options so I can correctly enter the data?