Product(s):	WaterGEMS, WaterCAD
	Version(s):	08.11.xx.xx and higher
	Area:	Modeling

Problem

How can you find or change the friction method used in WaterGEMS or WaterCAD?

Solution

The friction method can be found by going to Analysis > Calculation Options. Then double-click on the active calculation option. This will display the data in the calculation option in the Properties display.

Find the item "Friction Method" to see the current method used. You can change this by clicking the pulldown menu and choosing another option.

Once this is done, the properties for the pipes will display the friction method you selected in the calculation options. Values for the roughness can be added to the properties or the FlexTables.

Note: when using the Darcy-Weisbach method, the following article clarifies assumptions used:  Darcy-Weisbach Headloss Calculations in Steady State and EPS  

See Also

Does the friction method affect the local minor loss in pipe?