USER MANUAL SWAN Cycle III version 40.72A

36 Chapter 4
For a REGULAR grid:
[xpinp]
[ypinp]
[alpinp]
[mxinp]
[myinp]
[dxinp]
[dyinp]
geographic location (x−coordinate) of the origin of the input grid in
problem coordinates (in m) if Cartesian coordinates are used or in degrees if
spherical coordinates are use (see command COORD).
Default: [xpinp] = 0. In case of spherical coordinates there is no default, the
user must give a value.
geographic location (y−coordinate) of the origin of the input grid in
problem coordinates (in m) if Cartesian coordinates are used or in degrees if
spherical coordinates are use (see command COORD).
Default: [ypinp] = 0. In case of spherical coordinates there is no default, the
user must give a value.
direction of the positive x−axis of the input grid (in degrees, Cartesian convention).
See command COORD.
Default: [alpinp] = 0.
number of meshes in x−direction of the input grid (this number is one less
than the number of grid points in this direction!).
number of meshes in y−direction of the input grid (this number is one less
than the number of grid points in this direction!).
In 1D-mode, [myinp] should be 0.
mesh size in x−direction of the input grid,
in m in case of Cartesian coordinates or
in degrees if spherical coordinates are used, see command COORD.
mesh size in y−direction of the input grid,
in m in case of Cartesian coordinates or
in degrees if spherical coordinates are used, see command COORD.
In 1D-mode, [dyinp] may have any value.
Default: [dyinp] = [dxinp].
For a CURVILINEAR input (not fully tested for spherical coordinates):
[mxinp]
[myinp]
number of meshes in ξ−direction of the input grid (this number is one less
than the number of grid points in this direction!).
Default: [mxinp] = [mxc].
number of meshes in η−direction of the input grid (this number is one less
than the number of grid points in this direction!).
Default: [myinp] = [myc].
[stagrx] staggered x ′ −direction with respect to computational grid; default: 0.
Note: e.g. [stagrx]=0.5 means that the grid points are shifted a half step in
x ′ −direction; in many flow models x−velocities are defined in points shifted
a half step in x ′ −direction.
[stagry] staggered y ′ −direction with respect to computational grid; default: 0.
Note: e.g. [stagry]=0.5 means that the grid points are shifted a half step in