Minor losses due to bends, junctions, etc… can be added to both the steady flow and the unsteady flow solution. Minor losses are computed by the user entering a K loss coefficient at a specific cross section. The K loss coefficient can vary from 0.0 to 1.0. This loss coefficient gets multiplied by the velocity head at that specific cross section in order to compute the minor energy loss. This energy loss gets added to the energy equation for steady flow computations. For unsteady flow computations, the energy loss is converted to an equivalent force and inserted into the momentum equation. In both cases the energy loss is assumed to act as a force in the upstream direction to slow the flow down.
To use the minor loss option, select Minor Losses from the Tables menu at the top of the Geometric editor. When this option is selected, a table will appear allowing the user to enter a K loss coefficient at any desired cross section.