Darcy Friction Factor Calculator

Calculate Darcy Friction Factor

Formula

The formula to calculate the Darcy Friction Factor is:

\[ f = \frac{0.0791}{Re^{0.25}} \]

Where:

What is a Darcy Friction Factor?

The Darcy Friction Factor, also known as the Darcy-Weisbach friction factor, is a dimensionless quantity used in fluid dynamics to represent the resistance to flow in a pipe. It is a key parameter in the Darcy-Weisbach equation, which relates the head loss, or pressure loss, due to friction along a given length of pipe to the average velocity of the fluid flow. The factor depends on the roughness of the pipe’s interior surface and the Reynolds number, a measure of the flow’s turbulence.

Example Calculation 1

Let's assume the following value:

Using the formula:

\[ f = \frac{0.0791}{10000^{0.25}} = 0.00791 \]

The Darcy Friction Factor is 0.00791.

Example Calculation 2

Let's assume the following value:

Using the formula:

\[ f = \frac{0.0791}{50000^{0.25}} = 0.00532 \]

The Darcy Friction Factor is 0.00532.