Performs head losses calculations in sudden reduction. There are two options:
Given the flow and the inlet and outlet diameters of the sudden reduction, calculates the corresponding head loss. $$ h_f = k. \frac{U^2}{2g} $$
Given the inflow pipe diameter, calculates the head loss coeficients corresponding to the expressions:
k applicable to the expression: $$ h_f = k. \frac{U^2}{2g} $$
kQ applicable to the expression: $$ h_f = k_Q. Q^2
$$
Sudden reduction