Stuck in setting emitter coefficients of EPANET

[LORRIEYOY]

Hi, guys. I am using epanet to simulating the water leakage recently. To express the different extend of leakage, the emitter coefficients need to be set from 0-0.3 lps at the step of 0.002 lps, and then monitor the pressure variations in each node. But it is a big work to change emitter coeff. every time manually. I am curious that is there any ways to adjust this parameter automatically? like any the commands in 'controls'?

Thank you very much

 

[hydrae]

I would put a pattern on a demand, true while the flow may not adjust according to changes in pressure, you will see the changes in pressure due to the change in flow

Hydrae

 

[LORRIEYOY]

Thank you, you are right. But I think you've misunderstand my purpose. My aim is to monitor the variation of pressure according to the change of emitter coefficient. Anyway, thanks for you advice, if you know the way of how to change emitter coefficient automatically, I will be very grateful

 

[hydrae]

OK you really do want what you asked for: I was thinking maybe you could reverse the data, get all the data by stepping through a sequence of demands and build a lookup table from the data to get the info you want.

On a way to change emitter value, I agree the interface to change that parameter is cumbersome
the only easy way I can think of to change that globally is to setup editing in a text editor. The
input file is a text file that can be edited, you just gotta watch out for syntax and make sure your text editor does not convert it to different file type. Notepad works fine, wordpad also works but can convert the file to a '.doc' during a save.

Note: the use of emitters instead of demands it increases the work on the calculation engine so if you have a large model, calculation runs will take longer. But then again computers are so fast now you may not even notice.

Hydrae