Hello Sir,
In water hammer, when the transient calculation is carried out, i'm getting 1.00 in upsurge ratio column. On what input data does this upsurge value depends? and i'm getting same maximum and minimum Head and pressure values. how to resolve this?
Thank you,
Regards,
Sachin
Hello Sachin,
The upsurge ratio is the maximum transient pressure divided by the initial conditions pressure. 1.0 would mean that the maximum pressure is the same as steady state. The higher the number, the higher the upsurge, relative to the steady state pressure. It's basically a reference value to see where the highest surges are occuring.
So, it sounds like there is basically no transient occuring at that element where you see the 1.00 upsurge ratio. If you're getting 1.00 for all elements, it sounds like the model might not be correctly set up. If you're trying to model a pump shutdown for example, make sure you choose "shut after time delay" as the transient pump type, along with the correct delay, etc. Also make sure you're using a reasonable timestep and run duration. To check details on the results during the transient simulation, you should use the Transient Results Viewer, found under the Analysis menu.
If you are in need of technical support, please submit a service ticket using the service ticket manager .
Jesse Dringoli
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.