Enter the pipe diameter, pipe material, pipe length, and total elevation change to calculate the flow velocity and mass flow rate of a gravity-fed pipe flow.
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Pipe Flow Formula
The following formula is used to calculate the volumetric flow of water through a pipe of a certain diameter length and height.
v = k * C * R0.63 * S0.54
- Where k is a constant (.849)
- C is the roughness coefficient (dependent on the material of pipe)
- R is the hydraulic radius
- S is the slope of the pipe
- v is the velocity of water (m/s)
From this, the mass flow rate can be determined by multiplying the volume flow rate times the density.
m= p * v
- Where p is the density of the fluid
- v is the volumetric flow rate
Pipe Flow Definition
The pipe flow is defined as either the total mass or total volume of fluid moving through a pipe section at any point.
How to calculate pipe flow velocity?
How to calculate pipe flow velocity.
- First, determine the roughness coefficient.
This should be available based on the material used.
- Next, determine the hydraulic radius.
Calculate the hydraulic radius.
- Next, determine the slope of the pipe.
Calculate the slope of the pipe.
- Finally, calculate the flow velocity.
Using the formula above, calculate the flow velocity.
Pipe flow is defined as either the total mass or total volume of fluid moving through a pipe section at any point.