4.

Q = Volume flow rate, = find, P= find E, the velocity of approach factor, can be calculated with E = 1 / sqrt(1-B^4) E = 1 1-B4 requires knowledge of the product CE. The beta ratio is = do/d1 Then, the Reynolds number needs to be calculated: Red1 4Q Where, v is the fluid kinematic viscosity And d1 is the circular pipes diameter.