Dear Friends,

We are carrying out analysis ( flow simulation) for a pump. We wanted to obtain the pump characteristic curve for the model.

We gave the following inputs for trails :

a. Input volume flow rate ( m3/s).

b. static pressure at outlet.

Besides, we tried environmental pressure at the outlet instead of static pressure.

On both these cases, we found that the pump curve, **particularly head is climbing up against the discharge Q.**

Any suggestions? What should be the ideal boundary conditions or the factors that should be given as input to achieve required output.

Thank you for your valuable suggestions.

Sincerely,

Vipin kumar & Panneer selvam.

Hi VK,

My first question is did u know how to solve the centrifugal pump simulation in the flow simulation? Did u used rotating region option in your problem i.e. for specifying the impeller rotation value i.e. RPM.

Go through the online tutorials reg impeller problem in the flow simulation.

you metioned that u r having experimental data with you, so take one of volume flow rate conditions or inlet or out let pressure conditions and solve the problem i.e. specify the inlet volume flow rate and out let conditions is the environment/static pressure.

if you want apply the varying input volume flow rate condition means, use time dependent option in the general settings and use dependency option i.e. specify the volume flow rate W.R.T to the time.

define the goals i.e. pressure head loss i.e. differences of inlet/oulet pressure conditions, volume flow rate conditions etc.

form the goals plot data you can manuallly plot the discharge vs head varying graphs.

kindly let me know if i am wrong.

regards,

ameer.C