Velocity of Efflux (Torricelli's Law)

The Velocity of Efflux (Torricelli's Law) calculator computes the velocity of fluid out of the bottom of a tank based on the height of water in the tank.

INSTRUCTIONS: Choose units and enter the following:

• (h) Height of Water in Tank

Velocity of Efflux (v): The velocity is returned meters per second.  However, these can be automatically converted to compatible units via the pull-down menu.

The Math / Science

The Velocity of Efflux (Torricelli's Law) equation computes the velocity of fluid from a tank. Torricelli's Law states that the Velocity of Efflux of a fluid through a sharp-edged hole at he bottom of a tank filled to depth `h` is the same as the speed that a body (in this case a drop of water) would acquire in falling freely from a height.

`v=sqrt(2⋅g⋅h)`

where:

• g = acceleration due to gravity
• h = height
• v = velocity

References

The formula and defintion are from Wikipedia (https://en.wikipedia.org/wiki/Torricelli%27s_law).