Autodesk Water Solutions Specialist | 50+ Years Shaping the Industry Master of the full hydraulic-hydrologic stack—from the pioneering days of SWMM3 to today’s cloud-powered InfoDrainage and ICM SWMM. My career spans every generation of SWMM, XP-SWMM, InfoSWMM, InfoSewer, Civil 3D Drainage Analysis, and InfraWorks, translating surface–subsurface interactions into future-ready infrastructure.
The Reynolds Number is not shown in SWMM 5 of InfoSWMM but can easily be added to the SWMM 5 code as shown in Figure 1. The equation for the Reynolds Number is
Normally, as shown is Figure 3 the Reynolds number is is very high and is indicative of very turbulent flow based on typical flows, velocities and pipe diameters/hydraulic radius's in SWMM 5 (Figure 2).
Figure 1. Reynolds Number is calculated in SWMM 5 for Darcy-Weisbach Force Main Friction Loss.Figure 2. Reynolds Number is calculated in SWMM 5 for Darcy-Weisbach Force Main Friction Loss. Where is is the DW value entered for a Force Main.Figure 3. Reynolds Number is calculated in SWMM 5 for Darcy-Weisbach Force Main Friction Loss, Typical values of the Reynolds Number.
Autodesk Water Technologist for Storm Sewer and Flood | Expert in ICM InfoWorks ICM SWMM/Ruby | 18 Years at Innovyze/Autodesk | 52 Years with EPASWMM TAC for CIMM.ORG SWMM5+