Hello,
I'm simulating a storm water network in Sewergems plat form.
My network contains open channels, pipes, ponds, pond outlet structures and pumping option.
The network was design for 5 yr - 1 hr duration event. and I can simulate the model in Implicit solver with some adjustments to Implicit solver parameters. And I simulate the same model with Explicit solver and no much deviation in the results.
I want to check the same model performance for 50 yr -24 hr event. I could not fix the parameters so that the simulation ends with reasonable results in reasonable time. most of the time I was end up with the message "The model did not converge and no valid results are obtained, check the data or adjust calculation options"
I have two question.
1. Which solver would be the best suit with this nature of network?
2. In Explicit model, the drainage path considered as prismatic section. In my network I'm having channels (95% of network are open channels.). Do I need to convert my whole model in to conduits or does the software converts what ever the open channels in to Prismatic sections with in the software?
Thanks and Regards
Nishadi
Nishadi said:1. Which solver would be the best suit with this nature of network?
For a model with ponds and outlet structure, I recommend using the Explicit (SWMM) solver with the Routing Step between 1 and 5 seconds. This tends to work best in this type of model and there is mention of this here: Differences between solvers: GVF-Convex vs. GVF-Rational vs. Implicit vs. Explicit (SWMM)
Nishadi said:2. In Explicit model, the drainage path considered as prismatic section. In my network I'm having channels (95% of network are open channels.). Do I need to convert my whole model in to conduits or does the software converts what ever the open channels in to Prismatic sections with in the software?
The Explicit solver automatically assumes prismatic cross sectional areas when using channels and cross sections; there is no need to convert to conduits. If you have adequately spaced cross sections and relatively small changes, there should not be any notable impact of the prismatic assumption. See more here: Are Channels prismatic or non-prismatic?
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Answer Verified By: Nishadi
Thanks Jesse