how to set dynamic vale flow rates

[jinzhuyu]

Hi,

I would like to use dynamic flow rate for a valve. Could you please tell me how to do so? Thanks!

I tried to use "[VALVES]
;ID Node1 Node2 Diameter Type Setting MinorLoss
FCV12 12 13 10 FCV 125 0"
to set the valve flow rate, but I am not sure how to make specified flow rate change over the simulation steps.

[LRossman]

You can use a set of simple controls to change the FCV setting at specific points in time:

[CONTROLS]
Link FCV12 130 at Time 2  ; Flow setting is 130 at hour 2
Link FCV12 100 at Time 4  ; Flow setting is 100 at hour 4
etc.

[jinzhuyu]

Good morning, Thank you very much for the quick reponse. I added "[VALVES] ;ID Node1 Node2 Diameter Type MinorLoss FCV12 12 13 10 FCV 0" and then " FCV12 125 at TIME 0 ; Flow setting is 125 at hour 0 FCV12 130 at TIME 1 ; Flow setting is 130 at hour 1" or " FCV12 125 at TIME 0 FCV12 130 at TIME 1" but both led to the following error: "Error 201: syntax error in [CONTROLS] sections: ‘FCV12 125 at TIME 0 FCV12 130 at TIME 1’. I tried some variants, but the same error occurred. Can you tell me how to fix the syntax error? Thanks!

…

On Mon, Jul 8, 2024 at 8:19 AM Lew Rossman ***@***.***> wrote: You can use a set of simple controls to change the FCV setting at specific points in time: [CONTROLS] FCV12 130 at Time 2 ; Flow setting is 130 at hour 2 FCV12 100 at Time 4 ; Flow setting is 100 at hour 4 etc. — Reply to this email directly, view it on GitHub <#807 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AITYH4UGB73BIE62WRS5ZSDZLKGVPAVCNFSM6AAAAABKP743A2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDEMJUGA2TONBZGE> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[LRossman]

Sorry, I forgot to begin each control with the key word "Link". Please see the corrected post above.