When modeling a differential surge tank during a transient I am getting an error stating that I need 2 pipes to be connected to the surge tank. I found this solution: "With a surge tank using the surge tank type "Differential" there must be two pipes connected to the tank. Within the program, the external riser is assumed to be connected to the intersection of the two pipes." (Found here: http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/16985.when-modeling-a-differential-surge-tank-solution-500000097671).
However, I don't understand what it is explaining. The model help shows a schematic of a differential surge tank connected by an external riser--but does the recommendation above state that I need to have 2 pipes connecting the surge tank back to the main line? What do these two pipes represent if the model is assuming that the external riser is connected to the intersection of the two pipes?
Thanks.
Hello Michael,
The two pipes referenced in the article refer to the two adjacent pipes on the water main that would connect to the external riser (the main pipe upstream of the external riser connection and the main pipe downstream of the external riser connection)
I've updated the article to include some additional detail. Basically the external riser is already part of the differential surge tank node (you enter the external riser diameter in the tank properties) so it should be located on the main pipe.
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Answer Verified By: Sushma Choure