Hello !
Myself Rishi Nikude, I am a freshman majoring in CE. For our assignment we had to design WDS and I had done the same but now I am facing some issues regarding pressure in the system.
It would be nice if someone give their valuable input and correct me.
Thank youpressure study.wtg
In your modeling case you are directly pumping water from reservoir to tank, so tank defines the hydraulic grade here, which is initial elevation of tank being steady stare simulation.. Make sure tank levels are enough to provide enough flow / head.
Regards,
Sushma Choure
Bentley Technical Suppport
Answer Verified By: Rushikesh Nikude
Hello Rushikesh,
There is a negative pressure at J-21. Like all negative pressures, the hydraulic grade is below the ground elevation. This is explained in the link Sushma provided. At J-21, the elevation is higher relative to the nearby junctions, thus the pressure will be lower, and in this case negative. You will want to check to make sure the elevation here is accurate.
Negative pressures are also reported on the suction side of the pump. This occurs because the elevation of the pump is 10 meters higher than the reservoir. The hydraulic grade at the suction side of the pump will be the elevation of the reservoir minus the headloss in the pipe connecting the reservoir and the pump. Because the pump elevation is so much higher than the reservoir, negative pressures are reported at the suction side of the pump. You will want to make sure the pump elevation is accurate.
Scott
pressure study.wtgpkg.zip
Thank you Ma'am I have attached the following pipe
and the issue is related to negative pressure
Could you please elaborate what kind of pressure issues you are facing in the model , is it negative pressures or high pressures?
You have uploaded .wtg file only, .wtg.sqlite file also needs to be uploaded which is a database file without which model cannot be opened.
If you are getting negative pressures following information can be helpful, please go through it.
Troubleshooting negative pressures at pumps, junctions, & other node elements