[sarfarazii]

Hi everyone,
I am working on the simulation of the centrifugal pump. The problem is that i have speed of pump N=2900 RPM and i want to calculate the torque required by the pump for different discharge.
Somebody please help me.
its urgent b'coz i have to submit my thesis soon.

[coolcrasher]

you can use function objects in controlDict file which can calculate the forces and torques at the patch required.

functions
{
     forces
     {
               type forces;
               functionObjectLibs ("libforces.so");
               patches (rotor);
               rhoName rhoInf;
               rhoInf 1.0; // need to multiply result with your assumed density in kg/m3 in order to get N m
               CofR (0 0 0); //Origin for moment calculations
               outputControl outputTime;
               outputInterval 1;
     } 
}

However it gives me weird values for my case, I am confused if its problem with the function object or some problem with the case.
But I am not sure it works for you or not.

Let me know if it helps and give you reasonable results

All the best