Hello,I have a question related to the emitter coefficient of junction.My task is to determine how much will change the flow at the downstream reservoir(which in the program I consider as a junction) if we change pressure breaker elevation for +10m. (we know the material, diameter, length) I tried to use The outflow from an orificeQ=CA sqrt(2gh) ( C=0.62 from libraries)
but watergems uses emitter coefficient at the junction Q = k sqrt (P). is k some kind of conversion factor between head and pressure?Can we write that
k sqrt (P) = CA sqrt(2gh)
please help me to accomplish this equation or give advice on how to solve this kind of task.
Hello Levon,
The k value in the second equation is an emitter coefficient. It is typically used in hydrants and nozzles. You can find more information on this in the Help documentation by search for "emitter coefficient."
If you are trying to model flows that change with pressure, I would recommend looking at the following link: Options for modeling an outflow that varies with pressure. This would describe the different ways to model this. The choice you would make for your model will depend on the type of outflow you are using.
Regards,
Scott