i am using a pressure pume and i know the applied pressure. i would like to know flow rate. how to calculate the flow rate using known applied pressure to pump. kepping all other paramters solvent, tube diameter, tube length are same,
Yes, obviously the head needs to be calculated by eliminating the head loss due to friction. So the head needed to be applied in the formula I had mentioned is the difference between the Total head you have in your experiment and Head Loss due to Friction.
Head loss due to friction for Laminar or Viscous flow is by Hagen-Poiseuille's equation and for Turbulent flow is by Darcy Weishbach's equation.
To find whether the flow is laminar or not, use Reynold's no.
It would be good enough if you can share on how you had resolved the problem. So that what you have gained can be given back to society. It might help someone.
please look at following link for solution of calculating pressure from flow rate and vice versa. we using dolamite instruments so it is helpful for me. however, we don't know whether this calculation suitable for other instruments pumps or not.