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| 6 | <title>PALM chapter 4.5.4</title> |
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| 8 | <meta name="AUTHOR" content="Siegfried Raasch"> |
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| 19 | <h4 style="line-height: 100%;"><font size="4">4.5.4 Plots of 2d cross |
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| 20 | sections with iso2d</font></h4> |
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| 21 | <p style="line-height: 100%;">PALM permits simultaneous output xy, xz |
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| 22 | and |
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| 23 | yz cross sections. Since the output of all three cross section plots is |
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| 24 | steered in the same way, only the creation of xy plots is described.</p> |
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| 25 | <p style="line-height: 100%;">Output of xy cross |
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| 26 | sections requires to set at least two parameters: first, the temporal |
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| 27 | interval of the output time (run parameter <a |
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| 28 | href="chapter_4.2.html#dt_do2d_xy"><u>dt_do2d_xy)</u></a><span |
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| 29 | style="text-decoration: none;"> |
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| 30 | and second<span style="text-decoration: none;"></span> |
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| 31 | the names of the quantities for which cross section output is wanted</span><span |
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| 32 | style="text-decoration: none;"><span style="text-decoration: none;"> (<a |
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| 33 | href="chapter_4.2.html#data_output">data_output</a></span></span>). |
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| 34 | The string <span style="font-style: italic;">'_xy'</span> |
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| 35 | must be appended to these name strings in either case. Output times |
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| 36 | cannot be defined |
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| 37 | directly but only via the output time interval, starting from the |
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| 38 | beginning of the initial 3d run (t=0, but no cross sections are |
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| 39 | written at the time t=0; exceptions see <a |
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| 40 | href="chapter_4.2.html#do2d_at_begin">do2d_at_begin</a>). |
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| 41 | The exact location (height level) of the cross |
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| 42 | section(s) can be defined with run parameter <a |
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| 43 | href="chapter_4.2.html#section_xy">section_xy</a>. |
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| 44 | If no values have been assigned to <b>data_output</b> and <b>section_xy</b> or |
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| 45 | if the value given for <b>dt_do2d_xy </b>is |
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| 46 | larger than the simulated time (see <a href="chapter_4.1.html#end_time">end_time</a>), |
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| 47 | <b>then there will be no output!</b><br> |
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| 48 | </p> |
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| 49 | <p style="line-height: 100%;">Data is output in binary format |
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| 50 | into the |
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| 51 | local file <a href="chapter_3.4.html#PLOT2D_XY">PLOT2D_XY</a>. |
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| 52 | This file must be linked with a permanent file by |
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| 53 | using a file connection statement in the <b>mrun</b> configuration |
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| 54 | file (see e.g. <a href="chapter_3.2.html">chapter |
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| 55 | 3.2</a>). At the end of the run the local file is copied to this |
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| 56 | file. Such a statement can look like this: </p> |
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| 57 | <ul> |
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| 58 | <pre style="margin-bottom: 0.5cm; line-height: 100%;"><font |
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| 59 | style="font-size: 10pt;" size="2">PLOT2D_XY out:loc:tr pxy ~/PLOT/$fname _pxy_in.</font></pre> |
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| 60 | </ul> |
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| 61 | <p style="line-height: 100%;">If the respective <b>mrun</b> call is |
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| 62 | like </p> |
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| 63 | <ul> |
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| 64 | <pre style="margin-bottom: 0.5cm; line-height: 100%;"><font |
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| 65 | style="font-size: 10pt;" size="2">mrun -d test -r pxy
</font></pre> |
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| 66 | </ul> |
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| 67 | <p style="line-height: 100%;">then the local file <tt><font |
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| 68 | style="font-size: 10pt;" size="2">PLOT2D_XY</font></tt> |
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| 69 | is copied to the permanent file <tt><font style="font-size: 10pt;" |
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| 70 | size="2">~/PLOT/test/test_pxy_in</font> |
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| 71 | </tt>. However, the character string <font style="font-size: 10pt;" |
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| 72 | size="2"></font><tt><font style="font-size: 10pt;" size="2">pxy</font></tt><font |
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| 73 | style="font-size: 10pt;" size="2"></font> |
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| 74 | activating the file connection statement (see third column of the |
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| 75 | statement) must be given in the <b>mrun</b> call as argument of the |
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| 76 | option -r (and/or -o)<b>.</b> <span style="text-decoration: none;">If |
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| 77 | t</span>his is forgotten by mistake, the model outputs the data to |
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| 78 | the local file, but this is not copied to the permanent file and thus |
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| 79 | the data are not available for the user after the run has finished.</p> |
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| 80 | <p style="line-height: 100%;">The created data file can be |
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| 81 | directly used as input file for the plot software <b>iso2d</b>. |
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| 82 | However, this requires the user to assign <a |
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| 83 | href="chapter_4.2.html#data_output_2d_on_each_pe">data_output_2d_on_each_pe</a> |
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| 84 | = <i>.FALSE. </i>(see also at the end of this chapter) . <b>iso2d</b> |
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| 85 | needs another file, the so-called parameter file, which specifies the |
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| 86 | plot |
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| 87 | layout. This file contains a |
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| 88 | so-called global parameter set which applies to all plots as well as |
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| 89 | a local parameter set which is valid for each individual plot. These |
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| 90 | global and |
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| 91 | local parameter sets are also created by PALM and output into two |
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| 92 | different local files named <a href="chapter_3.4.html#PLOT2D_XY_GLOBAL">PLOT2D_XY_GLOBAL</a> |
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| 93 | and <a href="chapter_3.4.html#PLOT2D_XY_LOCAL">PLOT2D_XY_LOCAL</a>. |
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| 94 | These must be combined to one file via a so-called <a |
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| 95 | href="http://www.muk.uni-hannover.de/institut/software/mrun_beschreibung.html#chapter6.2">output |
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| 96 | command</a> in the configuration file. The resulting file also needs a |
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| 97 | file connection statement: </p> |
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| 98 | <ul> |
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| 99 | <pre style="line-height: 100%;"><font style="font-size: 10pt;" |
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| 100 | size="2">OC: [[ -f PLOT2D_XY_GLOBAL]] && cat PLOT2D_XY_LOCAL >> PLOT2D_XY_GLOBAL</font><br><br><font |
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| 101 | style="font-size: 10pt;" size="2">PLOT2D_XY_GLOBAL out:loc:tr pxy ~/PLOT/$fname _pxy_par.</font></pre> |
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| 102 | </ul> |
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| 103 | <p style="line-height: 100%;">The output command (corn shell syntax) |
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| 104 | tests whether the file <tt><font style="font-size: 10pt;" size="2">PLOT2D_XY_GLOBAL</font></tt> |
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| 105 | exists and if so the file <tt><font style="font-size: 10pt;" size="2">PLOT2D_XY_LOCAL</font></tt> |
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| 106 | is appended via the "cat" command to the file <tt><font |
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| 107 | style="font-size: 10pt;" size="2">PLOT2D_XY_GLOBAL</font></tt> |
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| 108 | which then contains all parameters needed by <b>iso2d</b>. This |
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| 109 | relatively pedantic proceeding is due to the fact that PALM |
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| 110 | can produce the file PLOT2D_XY_GLOBAL only at the end of the simulation |
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| 111 | (when the final value of the global <span style="font-weight: bold;">iso2d</span>-parameter |
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| 112 | <a |
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| 113 | href="http://www.muk.uni-hannover.de/institut/software/iso2d_beschreibung.html#PLANZ">planz</a> |
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| 114 | is known), while the local parameter sets are written continuously |
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| 115 | to the file PLOT2D_XY_LOCAL during the run. A consequence is, that in |
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| 116 | case of aborts of a run the file <tt><font style="font-size: 10pt;" |
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| 117 | size="2">PLOT2D_XY_GLOBAL</font></tt> |
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| 118 | has possibly not been created and thus a visualization of the data - |
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| 119 | although they may be available - is |
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| 120 | not possible (in such a case, the user may create the parameter file |
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| 121 | manually). </p> |
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| 122 | <p style="line-height: 100%;">If you are in the directory <tt><font |
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| 123 | style="font-size: 10pt;" size="2">~/PLOT/test</font></tt>, the data |
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| 124 | can be plotted by entering |
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| 125 | </p> |
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| 126 | <ul> |
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| 127 | <pre style="margin-bottom: 0.5cm; line-height: 100%;"><font |
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| 128 | style="font-size: 10pt;" size="2">iso2d -d test _pxy_in -p test_pxy_par</font></pre> |
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| 129 | </ul> |
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| 130 | <p style="line-height: 100%;">By default plot layout as specified in |
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| 131 | the parameter file is as follows: for each cross section of each |
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| 132 | individual quantity a seperate plot is created using isolines. Isolines |
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| 133 | with negative values are displayed in |
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| 134 | red color. The axes do not have labels and the units are [m]. For |
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| 135 | identification, each plot is |
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| 136 | provided with a title, which contains the model version number, the |
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| 137 | run identifier (base file name + number of the restart run), the name |
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| 138 | of the host where the run was executed, and the date and time of the |
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| 139 | beginning |
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| 140 | of the run. Furthermore each plot carries a |
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| 141 | caption where the name of the displayed quantity, the output time |
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| 142 | (starting from |
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| 143 | beginning of the 3d simulation, t=0) and the location of the cross |
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| 144 | sections (as height level and grid point number) is noted. </p> |
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| 145 | <p style="line-height: 100%;">The layout of the plots can be |
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| 146 | varied by editing the parameter file (according to the |
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| 147 | various features of <b>iso2d</b>: color shading, |
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| 148 | vector plots, streamlines, etc.). For a detailed description of the <span |
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| 149 | style="font-weight: bold;">iso2d</span> parameters see the |
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| 150 | <a |
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| 151 | href="http://www.muk.uni-hannover.de/institut/software/iso2d_beschreibung.html">iso2d</a> |
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| 152 | manual (only in German). </p> |
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| 153 | <p style="line-height: 100%;">With parallel runs and choice of <a |
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| 154 | href="chapter_4.2.html#data_output_2d_on_each_pe">data_output_2d_on_each_pe</a> |
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| 155 | = <i>.T.</i> each PE outputs the data of its subdomain |
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| 156 | to a separate file with the name PLOT2D_XY_<processor-Id>, |
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| 157 | whereby <processor-Id> is a four digit number (e.g. |
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| 158 | PLOT2D_XY_0000). These files are not suitable for <span |
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| 159 | style="font-weight: bold;">iso2d</span>, but after the |
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| 160 | end |
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| 161 | of a run they can be combined to one file readable by <span |
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| 162 | style="font-weight: bold;">iso2d</span>. This is done via a |
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| 163 | further output command in the configuration file: </p> |
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| 164 | <ul> |
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| 165 | <pre style="margin-bottom: 0.5cm; line-height: 100%;"><font |
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| 166 | style="font-size: 10pt;" size="2">OC:[[$ ( echo $localhost | cut -c1-3 ) = imbh ]] && combine_plot_fields.x</font></pre> |
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| 167 | </ul> |
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| 168 | <p style="line-height: 100%;">The program <tt><font |
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| 169 | style="font-size: 10pt;" size="2">combine_plot_fields.x</font></tt> |
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| 170 | collects the data from the individual processor files and outputs it |
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| 171 | into the local file <tt><font style="font-size: 10pt;" size="2">PLOT2D_XY</font></tt> |
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| 172 | which can be processed by <span style="font-weight: bold;">iso2d</span>. |
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| 173 | Using this call, possibly existing |
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| 174 | files of the other cross sections (xz, yz) and of 3d volume data are |
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| 175 | also combined. The tool writes |
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| 176 | informative messages about the actions accomplished into the job |
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| 177 | protocol, even if no files were found (i.e. the output command |
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| 178 | may remain in the configuration file, even if no appropriate files |
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| 179 | are created during the simulation). <br> |
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| 180 | <b><br> |
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| 181 | Note:</b> due to internal |
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| 182 | restrictions of <b>iso2d </b>the file <tt><font |
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| 183 | style="font-size: 10pt;" size="2">PLOT2D_XY</font></tt> |
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| 184 | may not contain more than 99 cross sections. This restriction does not |
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| 185 | apply |
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| 186 | for the production of video clips via <b>iso2d</b>. </p> |
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| 187 | <hr> |
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| 188 | <p style="line-height: 100%;"><br> |
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| 189 | <font color="#000080"><font color="#000080"><a href="chapter_4.5.3.html"><font |
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| 190 | color="#000080"><img src="left.gif" name="Grafik1" align="bottom" |
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| 191 | border="2" height="32" width="32"></font></a><a href="index.html"><font |
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| 192 | color="#000080"><img src="up.gif" name="Grafik2" align="bottom" |
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| 193 | border="2" height="32" width="32"></font></a><a |
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| 194 | href="chapter_4.5.5.html"><font color="#000080"><img src="right.gif" |
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| 195 | name="Grafik3" align="bottom" border="2" height="32" width="32"></font></a></font></font></p> |
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| 196 | <p style="line-height: 100%;"> <i>Last change: </i> |
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| 197 | 20/04/05 (SR)</p> |
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| 198 | </body> |
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| 199 | </html> |
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