USER MANUAL SWAN Cycle III version 40.72A

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70 Chapter 4 | < [xp] [yp] > | POINts ’sname’ < > | FILE ’fname’ | With this optional command the user defines a set of individual output locations (points). The coordinates of these points are given in the command itself or read from a file (option FILE). ’sname’ [xp],[yp] name of the points problem coordinates of one output location if Cartesian coordinates are used in m if spherical coordinates are used in degrees (see command COORD) | [xpn] [ypn] [alpn] [xlenn] [ylenn] [mxn] [myn] | NGRid ’sname’ < | -> TRIAngle | | UNSTRUCtured < > ’fname’ | | EASYmesh | CANNOT BE USED IN 1D-MODE. If the user wishes to carry out nested SWAN run(s), a separate coarse-grid SWAN run is required. With this optional command NGRID, the user defines in the present coarse-grid run, a set of output locations along the boundary of the subsequent nested computational grid. The set of output locations thus defined is of the type NGRID. Command NESTOUT is required after this command NGRID to generate some data for the (subsequent) nested run (not with command BLOCK because a set of locations of the type NGRID does represent an outline and not a geographic region). ’sname’ [xpn] [ypn] name of the set of output locations along the boundaries of the following nested computational grid defined by this command geographic location of the origin of the computational grid of this coarse-grid run in the problem coordinate system (x−coordinate) if Cartesian coordinates are used in m if spherical coordinates are used in degrees (see command COORD) geographic location of the origin of the computational grid of this coarse-grid run in the problem coordinate system (y−coordinate) if Cartesian coordinates are used in m if spherical coordinates are used in degrees (see command COORD)
Description of commands 71 [alpn] direction of the positive x−axis of the computational grid of this coarse-grid run (in degrees, Cartesian convention). [xlenn] length in the x−direction of the nested grid if Cartesian coordinates are used in m if spherical coordinates are used in degrees (see command COORD) [ylenn] length in the y−direction of the nested grid if Cartesian coordinates are used in m if spherical coordinates are used in degrees (see command COORD) [mxn] number of meshes of the output grid in the x−direction of this grid (this number is one less than the number of grid points in this direction!). [mxn] does not have to be equal to the number of meshes in the nested computation; SWAN will interpolate the required information. Default: [mxn] is chosen such that the mesh size of the output grid is (roughly) equal to the mesh size of the coarse grid, but at least 1. [myn] number of meshes of the output grid in the y−direction of this grid (this number is one less than the number of grid points in this direction!). [myn] does not have to be equal to the number of meshes in the nested computation; SWAN will interpolate the required information. Default: [myn] is chosen such that the mesh size of the output grid is (roughly) equal to the mesh size of the coarse grid, but at least 1. UNSTRUCTURE with this option the user indicates that the subsequent nested grid is an unstructured one. Only grids generated by Triangle and Easymesh are supported by SWAN. TRIANGLE the necessary grid information is read from two files as produced by Triangle. The .node and .ele files are required. The basename of these files must be indicated with parameter ’fname’. EASYMESH the necessary grid information is read from two files as produced by Easymesh. The .n and .e files are required. The basename of these files must be indicated with parameter ’fname’. ’fname’ basename of the required files, i.e. without extension. 4.6.2 Write or plot computed quantities For definitions of output parameters, see Appendix A. WARNING: When integral parameters are computed by the user from the output spectrum of SWAN, differences with the SWAN-computed parameters may occur. The reasons are: • SWAN accepts at the boundaries of the computational grid only the user-imposed incoming wave components and it replaces the user-imposed outgoing wave components with computed components (propagating to the boundary from the interior region). Note that this will not happen in case of triangular meshes.
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SWAN USER MANUAL SWAN Cycle III ver
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Contents 1 Introduction 1 2 General
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TABLE . . . . . . . . . . . . . . .
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Chapter 1 Introduction The informat
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Chapter 2 General definitions and r
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General definitions and remarks 5 r
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General definitions and remarks 7 I
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which SWAN performs the computation
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General definitions and remarks 11
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Page 27 and 28: Chapter 3 Input and output files 3.
Page 29 and 30: Chapter 4 Description of commands 4
Page 31 and 32: (h) Commands to write or plot outpu
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: Description of commands 69 (see bel
Page 81 and 82: Description of commands 73 ‘long
Page 83 and 84: | HSign | | | | HSWEll | | | | DIR
Page 85 and 86: Description of commands 77 | WLENgt
Page 87 and 88: Description of commands 79 QP DEPTH
Page 89 and 90: Description of commands 81 [tbegblk
Page 91 and 92: Description of commands 83 OUTput [
Page 93 and 94: Description of commands 85 If SWAN
Page 95 and 96: Description of commands 87 ACCUR MX
Page 97 and 98: Appendix A Definitions of variables
Page 99 and 100: Definitions of variables 91 RPER co
Page 101 and 102: Definitions of variables 93 WLEN Th
Page 103 and 104: Appendix B Command syntax B.1 Comma
Page 105 and 106: Repetitions of keywords and/or othe
Page 107 and 108: Required data and optional data Com
Page 109 and 110: Appendix C File swan.edt Below the
Page 111 and 112: File swan.edt 103 ! | -> DEFault !
Page 113 and 114: File swan.edt 105 ! FRAME ’sname
Page 115 and 116: Appendix D Spectrum files, input an
Page 117 and 118: 0.3892E-03 192.0 15.2 0.8007E-03 24
Page 119 and 120: Spectrum files, input and output 11
Page 121 and 122: Spectrum files, input and output 11
Page 123 and 124: Bibliography [1] SWAN - Implementat
Page 125: 117 longitude, 8, 27, 49, 50, 85, 1
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