Hello @Kremella ,

For an incompressible, laminar flow through a circular pipe, one can calculate the pressure drop using the Hagen-Poiseuille equation which is given below

del_P = (8 * mu * L * Q) / (pi * R^4)

where,

del_P - pressure drop [Pa]

mu - dynamic viscosity [Pa-s]

L - pipe length [m]

Q - volumetric flow rate [m^3/s]

R - pipe radius [m]