Hi Rob,

Thank you for the reply. What I need is to basically find out how resistant is each tube to the given volume. Is the tube that is 14 cm more resistant compared to the other tubes ? I am able to get the inlet and outlet pressure difference. Would this is delta P be the resistance of the system to the tube ? I assumed taking the flow rate through each hole against the pressure drop in each hole would give me the slope which would be resistance ? Also if there a way to find the pressure drop in each hole surface from fluent solver ? For example I see that I can select each hole face and choose total pressure, dynamic and such. Is there a choice that would give me the total pressure drop across the hole ? Thank you Rob.