Bagley correction constants, and, specific for each resin. If the specific data does not exist, you can use typical values to evaluate whether juncture loss is significant to the application.
Juncture loss is a calculation of the hydraulic loss that occurs when the melt passes through a large change in path diameter. Such a change can occur from the end of the runner to the gate. The software calculates this loss using the Bagley correction constants, and, for the material.
If juncture loss data is not available for the material that you select, use typical values for the juncture loss coefficients. Values range from 0.00001 to 10 (typically 0.0001), while values range from 2.5 to 1 (typically 2). If analysis results show that juncture loss is significant to your application, we recommend that Autodesk Moldflow Plastics Labs characterizes the material for juncture loss coefficients.