TUFLOW 2D Hydraulic Structures: Difference between revisions

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= Common Questions Answered (FAQ)=
== What is the difference between using polyline and polygon for 2D bridges and when should I use either approach? ==
When using 2d_lfcsh, the form loss coefficient (FLC) is applied differently when using a line compared to a polygon. The FLC is applied at cell sides (u and v points) as this is where velocities are calculated.