A channel’s cross-section geometry can be varied by setting it as a variable geometry channel (see Channel_Type “V” in Table 4 .10). In addition, a VG Table in fixed field format is required as documented below. VG Tables are read using VG Data (see VG Tables (1D) for the format).
3.14.4.6Non-Inertial Channels
In order to bypass the Courant stability condition, a special channel type (N) is included, known as non-inertial channel or a friction-controlled channel. For this channel, the inertial terms are ignored (eliminating inertial effects) and the stability control procedure is automatically applied.
This channel type may be used to model flow areas not allowed for otherwise.
