Discharge Height of Vertical Pipes

The Discharge Height of Vertical Pipes calculator estimates the flow (F) volume from a vertical pipe based on the height (h) of discharge, the diameter (D) of the pipe and flow constant (k).

INSTRUCTIONS: Choose units and enter the following;

• (h)  This is the height of the fluid above the pipe.
• (k)  This is the flow coefficient.  It ranges from 0.87 up to 0.97 for pipes with diameters between 2 and 6 inches, and for height up to two feet.
• (D)  This is the diameter of the pipe.

Vertical Discharge (F): The calculator returns the flow rate in gallons per minute.  However, this can be automatically converted to compatible units via the pull-down menu.

Related Calculators

• Compute the total volume of flow over time

The Math/Science

The formula for Volume of Vertical Discharge is:

• `F = sqrt(h)*k*D^2*5.68`

where:

• F is the flow rate in gallons per minute
• h is the height of the water plume above the pipe opening
• D is the diameter of the pipe
• k is a constant that ranges from 0.87 to 0.98 for heights up to 2 feet.