Friday, July 26, 2013
How is RHO computed for a Link in SWMM 5?
Subject: How is RHO computed for a Link in SWMM 5?
SWMM 5 uses a sliding metric to calculate the cross sectional area and hydraulic radius used in the simulation for the link dynamic flow. The area and hydraulic radius used moves from the Upstream End of the Link to the Midpoint of the Link based on the Froude number and a few other considerations (see Figure 1 for the other considerations).
The area and hydraulic radius used as a function of the Froude Number:
1. Upstream cross sectional area and upstream hydraulic radius is used when the Froude Number > 1
2. Midpoint sectional area and hydraulic radius is used then the Froude Number is < 0.5
3. An area and hydraulic radius between the upstream and midpoint sections is used then the Froude Number is between 0.5 and 1
Figure 1: How to compute RHO based on the Froude Number.
Figure 2: The computed value of the Froude Number and the value of RHO over time.
Figure 3: Relationship between the upstream area, midpoint area and the actual area used during the simulation.
Culvert inlets and outlets To improve the process of defining culvert inlet and culvert outlet losses for an InfoWorks network, a new fiel...
@Innovyze User forum where you can ask questions about our Water and Wastewater Products http://t.co/dwgCOo3fSP pic.twitter.com/R0QKG2dv...
Engine Error Number Description ERROR 101: memory allocation error. ...
From CHI - International Conference on Stormwater and Urban Water Systems Modeling, Toronto Canada (February 26 and 27) - Call for papers47th Annual International Conference Toronto, Canada February 26-27, 2014 Call for papers Have you implemented a good idea recen...