These are fluid dynamic question please help will rate thank

These are fluid dynamic question please help will rate thanks in advance Why is coefficient of discharge(C) not constant? How would the value of coefficient of discharge(C) be effected if the apparatus was resting on a sloping ground? Explain....

Solution

Coefficient of discharge is not a constant as it is a function of many parameters like the ratio of the length of the orifice to diameter of orifice, Reynolds number flow condition-whether it is increasing or decreasing pressure at the exit of the orifice (back pressure) Orifice entry condition- like smooth entry, sharp edged entry etc.

The coefficient of discharge will increase if the slope favors the exit and decrease if it does not.