List of available commands

The following commands are available to users of SWAN (to look for the commands quickly, see table of contents and index).


Start-up commands

(a)

Start-up commands:

PROJECT	title of the problem to be computed
SET	sets values of certain general parameters
MODE	requests a stationary / nonstationary or
	1D-mode / 2D-mode of SWAN
COORD	to choose between Cartesian and spherical coordinates

Commands for model description

(b)

Commands for computational grid:

CGRID	defines dimensions of computational grid
READGRID	reads a curvilinear or unstructured computational grid

(c)

Commands for input fields:

INPGRID	defines dimensions of bottom, water level, current and friction grids
READINP	reads input fields
WIND	activates constant wind option
ICE	activates constant ice field option

(d)

Commands for boundary and initial conditions:

BOUND	defines the shape of the spectra at the boundary of geographic grid
BOUNDSPEC	defines (parametric) spectra at the boundary of geographic grid
BOUNDNEST1	defines boundary conditions obtained from (coarse) SWAN run
BOUNDNEST2	defines boundary conditions obtained from WAM run
BOUNDNEST3	defines boundary conditions obtained from WAVEWATCH III run
INITIAL	specifies an initial wave field

(e)

Commands for physics:

GEN1	SWAN runs in first generation mode
GEN2	SWAN runs in second generation mode
GEN3	SWAN runs in third generation mode
WCAP	controls whitecapping
QUAD	controls the computation of quadruplets
BREAKING	activates dissipation by depth-induced wave breaking
FRICTION	activates dissipation by bottom friction
TRIAD	activates three wave-wave interactions
VEGETAT	activates dissipation due to vegetation
MUD	activates dissipation due to mud
SICE	activates dissipation due to sea ice
TURBULE	activates dissipation due to turbulence
BRAGG	activates Bragg scattering
LIMITER	de-actives quadruplets if a certain Ursell number exceeds
OBSTACLE	defines characteristics of sub-grid obstacles
SETUP	activates the computation of the wave-induced set-up
DIFFRAC	activates diffraction
SURFBEAT	activates the Infragravity Energy Module (IEM)
OFF	de-activates certain physical processes

(f)

Commands for numerics:

PROP	to choose the numerical propagation scheme
NUMERIC	sets some of the numerical properties of SWAN

Output commands

(g)

Commands for output locations:

FRAME	defines an output frame (a regular grid)
GROUP	defines an output group (for regular and curvilinear grids)
CURVE	defines an output curve
RAY	defines a set of straight output lines (rays)
ISOLINE	defines a depth- or bottom contour (for output along that contour)
POINTS	defines a set of individual output points
NGRID	defines a nested grid

(h)

Commands to write or plot output quantities:

QUANTITY	defines properties of output quantities
OUTPUT	influence format of block, table and/or spectral output
BLOCK	requests a block output (geographic distribution)
TABLE	requests a table output (set of locations)
SPECOUT	requests a spectral output
NESTOUT	requests a spectral output for subsequent nested computations

(i)

Commands to write or plot intermediate results:

TEST

requests an output of intermediate results for testing purposes

Lock-up commands

(j)

Commands to lock-up the input file:

COMPUTE	starts a computation
HOTFILE	stores results for subsequent SWAN run
STOP	end of user's input