| Applies To | |||
| Product(s): | AutoPIPE | ||
| Version(s): | ALL | ||
| Environment: | N/A | ||
| Area: | Modeling | ||
| Original Author: | Bentley Technical Support Group | ||
| Date Logged & Current Version | Sept. 2015 09.06.02.06 | ||
Problem:
Why should the flow rate be positive or negative in AutoPIPE Fluid transient?
Solution:
When the valve closes, the downstream side tries to pull a vacuum, so the pressure is negative and flow rate is positive. The upstream side is opposite.