Friction factor calculator

The tool can be used for any flow type. Tables for pipe roughness and kinematic viscosity are also included. Solving for friction factor.

Calculator iterates until the error is within 1. How do you calculate friction factor? What is the equation for friction factor? How to calculate friction coefficient for various surfaces? Units in Darcy-Weisbach calculator : ft=foot, m=meter, s=second.

A commonly used chart is the Moody friction factor chart, shown in the diagram on the left. Check on whether the given flow is completely turbulent flow 3. Be able to use the Darcy Weisbach equation and the Moody friction factor equations to calculate the frictional head loss and frictional pressure drop for a given flow rate of a specified fluid through a pipe with known diameter, length and roughness. Depending on the Reynolds Number, the friction factor , abbreviated as f, may be calculated one of several ways. I changed the roughness height to 0. So that’s how you create a Colebook equation solver in Excel. This method can be extended to tables of data to calculate pressure drop vs.

The pressure drop is then calculated using the viscous head equation above. The calculator above first computes the Reynolds Number for the flow. Enter the flow rate, internal pipe diameter, and the type of pipe from the list supplied. Haaland of the Norwegian Institute of Technology.

You guess a Reynolds number, solve for a friction factor , calculate a flow rate, calculate a new Reynolds number with the new velocity, use that value to calculate a new friction factor , and then repeat until the change from one step to the next is acceptably small. These factors make it harder to move them past each other. You don’t work at this level when you calculate the force of friction , though.

For everyday situations, physicists group all of these factors together in the “coefficient” μ. The Moody Chart finally provided a method of finding an accurate friction factor and this encouraged use of the Darcy-Weisbach equation, which quickly became the method of choice for hydraulic engineers. If the value of the friction factor is 0. Darcy friction factor is plotted in the Moody diagram. Engineering Center The following equation is for calculating the TOTAL friction. The level of friction loss depends on a number of factors : The material the pipe is made from - a rougher inner pipe surface will result in a greater friction loss.

The thread compound friction factor helps determine the correct amount of makeup torque required for rotary-shouldered connections. The makeup torque calculations for rotary-shouldered connections in API 7G were based on lead-based thread compounds, which have a friction factor of 1. Friction head loss calculator.