I have a question about a variable input DAW(1) = 11*31.4159265 in ART WAVE.
DAW(I) definition is Surface area in unit length of the volume I so I calculate it by use surface area of the pipe divides by the pipe volume and the answer is 0.970874, PI()*Diameter*Length/Volume = PI()*4.12*10/133.3166, that does not equal 31.4159265.
I think that I may misunderstand in something about a formula to calculate DAW(I), Could you please inform me which the correct method to find DAW(I).