Hfric_m is the sum of im*pipe.length. I define im as in the Wilson book, as head loss/m expressed as feet of fresh water (actually water at s.g. 1.0). The slurry object and the framework return im/il per that definition. The slurry/fluid density is already included in Hric_m/Hfric_l, but not in the fitting, elevation or velocity head.
Hfric_mis the sum ofim*pipe.length. I defineimas in the Wilson book, as head loss/m expressed as feet of fresh water (actually water at s.g. 1.0). The slurry object and the framework returnim/ilper that definition. The slurry/fluid density is already included inHric_m/Hfric_l, but not in the fitting, elevation or velocity head.