USER MANUAL SWAN Cycle III version 40.72A

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22 Chapter 4 (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 GEN2 GEN3 WCAPPING QUAD BREAKING FRICTION TRIAD LIMITER OBSTACLE SETUP DIFFRAC OFF SWAN runs in first generation mode SWAN runs in second generation mode SWAN runs in third generation mode activates cumulative steepness method for whitecapping controls the computation of quadruplets activates dissipation by depth-induced wave breaking activates dissipation by bottom friction activates three wave-wave interactions de-actives quadruplets if a certain Ursell number exceeds defines characteristics of sub-grid obstacles activates the computation of the wave-induced set-up activates diffraction de-activates certain physical processes (f) Commands for numerics: PROP NUMERIC to choose the numerical propagation scheme sets some of the numerical properties of SWAN Output commands (g) Commands for output locations: FRAME GROUP CURVE RAY ISOLINE POINTS NGRID defines an output frame (a regular grid) defines an output group (for regular and curvi-linear grids) defines an output curve defines a set of straight output lines (rays) defines a depth- or bottom contour (for output along that contour) defines a set of individual output points defines a nested grid
(h) Commands to write or plot output quantities: Description of commands 23 QUANTITY OUTPUT BLOCK TABLE SPECOUT NESTOUT defines properties of output quantities influence format of block, table and/or spectral output requests a block output (geographic distribution) requests a table output (set of locations) requests a spectral output 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 HOTFILE STOP starts a computation stores results for subsequent SWAN run end of user’s input 4.2 Sequence of commands SWAN executes the above command blocks (a,...,j) in the above sequence except (f), (i) and (j). The commands of the blocks (f) and (i) may appear anywhere before block (j), except that TEST POINTS must come after READINP BOTTOM. The commands of block (j) may appear anywhere in the command file (all commands after COMPUTE are ignored by SWAN, except HOTFILE and STOP). A sequence of commands of block (g) is permitted (all commands will be executed without overriding). Also a sequence of commands of block (h) is permitted (all commands will be executed without overriding). Within the blocks the following sequence is to be used: In block (a) In block (b) In block (c) In block (d) In block (e) In block (f) : no prescribed sequence in block : READGRID after CGRID : READINP after INPGRID (repeat both in this sequence for each quantity) : BOUND SHAPE before BOUNDSPEC, otherwise no prescribed sequence in block : use only one GEN command; use command OFF only after a GEN command (note that GEN3 is default) : no prescribed sequence in block
Page 1: SWAN USER MANUAL SWAN Cycle III ver
Page 5 and 6: Contents 1 Introduction 1 2 General
Page 7 and 8: TABLE . . . . . . . . . . . . . . .
Page 9 and 10: Chapter 1 Introduction The informat
Page 11 and 12: Chapter 2 General definitions and r
Page 13 and 14: General definitions and remarks 5 r
Page 15 and 16: General definitions and remarks 7 I
Page 17 and 18: which SWAN performs the computation
Page 19 and 20: General definitions and remarks 11
Page 27 and 28: Chapter 3 Input and output files 3.
Page 29: Chapter 4 Description of commands 4
Page 33 and 34: Description of commands 25 ’name
Page 35 and 36: Description of commands 27 Default:
Page 37 and 38: Description of commands 29 mesh. Th
Page 39 and 40: ⎛ ∆f = ⎝−1 + Description of
Page 41 and 42: Description of commands 33 • Easy
Page 43 and 44: Description of commands 35 grids ca
Page 45 and 46: Description of commands 37 y ′
Page 47 and 48: Description of commands 39 [fac]
Page 49 and 50: Description of commands 41 ’(10X,
Page 51 and 52: Description of commands 43 | | East
Page 53 and 54: Description of commands 45 CONSTANT
Page 55 and 56: Description of commands 47 points o
Page 57 and 58: Description of commands 49 CRAY WKS
Page 59 and 60: Description of commands 51 This com
Page 61 and 62: Description of commands 53 | JANSse
Page 63 and 64: Description of commands 55 [Csh3] c
Page 65 and 66: Description of commands 57 [ursell]
Page 67 and 68: Description of commands 59 [slope]
Page 69 and 70: Description of commands 61 [cgmod]
Page 71 and 72: Description of commands 63 < > [lim
Page 73 and 74: Description of commands 65 SIGIMPL
Page 75 and 76: Description of commands 67 ’sname
Page 77 and 78: Description of commands 69 (see bel
Page 79 and 80: Description of commands 71 [alpn] d
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Description of commands 73 ‘long
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| HSign | | | | HSWEll | | | | DIR
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Description of commands 77 | WLENgt
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Description of commands 79 QP DEPTH
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Description of commands 81 [tbegblk
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Description of commands 83 OUTput [
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Description of commands 85 If SWAN
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Description of commands 87 ACCUR MX
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Appendix A Definitions of variables
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Definitions of variables 91 RPER co
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Definitions of variables 93 WLEN Th
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Appendix B Command syntax B.1 Comma
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Repetitions of keywords and/or othe
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Required data and optional data Com
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Appendix C File swan.edt Below the
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File swan.edt 103 ! | -> DEFault !
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File swan.edt 105 ! FRAME ’sname
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Appendix D Spectrum files, input an
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0.3892E-03 192.0 15.2 0.8007E-03 24
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Spectrum files, input and output 11
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Spectrum files, input and output 11
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Bibliography [1] SWAN - Implementat
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117 longitude, 8, 27, 49, 50, 85, 1
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