Dear All,
I have designed a water supply system. In this system there are four pumping stations. (Fixed location). I have assigned my desired flow and head to each pump and demand at every junctions. When I have run my model, It's giving me negative pressure in few junctions in distribution lines where elevations are higher than reservoir's elevation as there are many high and low points in whole system. Please suggest me how to solve this negative pressure. Is this problem related to boundary conditions ?
Hello Syed,
Negative pressures can occur for a few reasons. They could be related to the elevation of the node, the elevation of the boundary, the head added by a pump, or excessive headlosses in pipes. Reviewing the input and results for some of these may identify the cause of the issue. This link has further information on other things you can look at to try to resolve the issue: Troubleshooting negative pressures at pumps, junctions, & other node elements.
If this doesn't help, a copy of the model files may be needed.
Regards,
Scott