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### Drop

Figure 103: Geometry of a drop

The geometry of a drop is shown in Figure 103. Although a drop is really a discontinuity, a small fictitious length an a slope have to be assigned. For the slope one can take the mean values of the slopes of the adjacent channels. The following constants have to be specified on the line beneath the *FLUID SECTION,TYPE=CHANNEL DROP card:

- the width
- the slope (if zero is taken)
- the length (if the length is calculated from the coordinates of the end nodes belonging to the element)
- the drop size

Example files: channel10, channel12.