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Timestamp:
Mar 13, 2007 2:52:40 AM (18 years ago)
Author:
raasch
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  • palm/trunk/DOC/app/chapter_3.0.html

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    11<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
    2 <html>
    3 <head>
    4   <meta http-equiv="CONTENT-TYPE"
    5  content="text/html; charset=windows-1252">
    6   <title>PALM chapter 3.0</title>
    7   <meta name="GENERATOR" content="StarOffice 7  (Win32)">
    8   <meta name="AUTHOR" content="Marcus Oliver Letzel">
    9   <meta name="CREATED" content="20040723;15213734">
    10   <meta name="CHANGED" content="20041112;13170538">
    11   <meta name="KEYWORDS" content="parallel LES model">
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    18 <body dir="ltr" lang="en-US">
    19 <h2 style="font-style: normal; line-height: 100%;"><font size="4">3.0
     2<html><head>
     3<meta http-equiv="CONTENT-TYPE" content="text/html; charset=windows-1252"><title>PALM
     4chapter 3.0</title> <meta name="GENERATOR" content="StarOffice 7 (Win32)"> <meta name="AUTHOR" content="Marcus Oliver Letzel"> <meta name="CREATED" content="20040723;15213734"> <meta name="CHANGED" content="20041112;13170538"> <meta name="KEYWORDS" content="parallel LES model"> <style>
     5<!--
     6@page { size: 21cm 29.7cm }
     7-->
     8</style></head>
     9
     10<body style="direction: ltr;" lang="en-US"><h2 style="font-style: normal; line-height: 100%;"><font size="4">3.0
    2011Execution of model runs</font></h2>
    2112<p style="line-height: 100%;">Given that the model was
    2213installed by the user (look at <a href="chapter_5.0.html">chapter
    23 5.0</a>) and that it is clear, which phenomenon is to be simulated,
     145.0</a>) and that it is clear, which phenomenon is to be
     15simulated,
    2416there is a whole set of questions which must be answered before
    2517executing
    2618the actual application run, e.g.: </p>
    27 <ul>
    28   <li>
    29     <p
    30  style="margin-bottom: 0cm; font-style: normal; line-height: 100%;">How
     19<ul> <li> <p style="margin-bottom: 0cm; font-style: normal; line-height: 100%;">How
    3120large does the model domain have to be and what grid size does
    32 phenomenon to be simulated require? </p>
    33   </li>
    34   <li>
    35     <p
    36  style="margin-bottom: 0cm; font-style: normal; line-height: 100%;">How
     21phenomenon to be simulated require? </p> </li> <li>
     22<p style="margin-bottom: 0cm; font-style: normal; line-height: 100%;">How
    3723long is the time which should be simulated, i.e. which typical time
    38 scale does the phenomenon have? </p>
    39   </li>
    40   <li>
    41     <p
    42  style="margin-bottom: 0cm; font-style: normal; line-height: 100%;">Which
     24scale does the phenomenon have? </p> </li> <li> <p style="margin-bottom: 0cm; font-style: normal; line-height: 100%;">Which
    4325boundary conditions and initial conditions are to be selected? </p>
    44   </li>
    45   <li>
    46     <p style="font-style: normal; line-height: 100%;">Which model
     26</li> <li> <p style="font-style: normal; line-height: 100%;">Which model
    4727output data are necessary at which points in time, in order to be able
    48 to analyze the phenomenon afterwards? </p>
    49   </li>
    50 </ul>
    51 <p style="line-height: 100%;">The answers to these questions
     28to analyze the phenomenon afterwards? </p> </li>
     29</ul><p style="line-height: 100%;">The answers to
     30these questions
    5231substantially determine the choice of values for the most important
    5332model parameters, with which the model run is steered. All possible
    … …  
    5736The basic steering of the model with these parameters is explained in
    5837the introduction to <a href="chapter_4.0.html">chapter
    59 4</a>. The user will rarely use all model parameters, since many are
     384</a>. The user will rarely use all model parameters, since many
     39are
    6040preset with consistent default values and therefore do not have to be
    6141changed by the user. Some of the most important parameters are not
    6242preset with default values and must be adjusted by the user in each
    63 case. Such a typical, minimum parameter set is described in <a
    64  href="chapter_4.4.html">chapter
     43case. Such a typical, minimum parameter set is described in <a href="chapter_4.4.html">chapter
    65444.4</a>. For the subsequent analysis of model runs, graphical
    66 visualization of model data is particularly important. <a
    67  href="chapter_4.5.html">Chapter
     45visualization of model data is particularly important. <a href="chapter_4.5.html">Chapter
    68464.5</a> describes, how such outputs are produced with the model. </p>
    69 <p style="line-height: 100%;">The selected parameters and their values
     47<p style="line-height: 100%;">The selected parameters and
     48their values
    7049have to be supplied to the model as an input file. The
    71 structure of this file is described in the introduction to <a
    72  href="chapter_4.0.html">chapter
    73 4</a>. The data, produced by the model, are located in a number of
     50structure of this file is described in the introduction to <a href="chapter_4.0.html">chapter
     514</a>. The data, produced by the model, are located in a number
     52of
    7453different output files. The model works with relative file names
    7554(i.e. without absolute path information). Thus all input and output
    … …  
    7857executable program created from the FORTRAN source code) is started
    7958(but also see next paragraph).
    80 All user-relevant input and output files are described in <a
    81  href="chapter_3.4.html">chapter
     59All user-relevant input and output files are described in <a href="chapter_3.4.html">chapter
    82603.4</a>. </p>
    83 <p style="line-height: 100%;">The actual model (the executable
     61<p style="line-height: 100%;">The actual model (the
     62executable
    8463program) is not started directly via the user, but with the help of
    85 the shell script <a
    86  href="http://www.muk.uni-hannover.de/institut/software/mrun_beschreibung.html">mrun</a>,which
     64the shell script <a href="http://www.muk.uni-hannover.de/institut/software/mrun_beschreibung.html">mrun</a>,which
    8765can be called by the user. This script takes over the entire pre- and
    8866postprocessing work, which is necessary for a model run. In addition
    … …  
    9169input and output files to these computers, secures data on existing
    9270archives systems, starts if necessary restart jobs, and much more.
    93 <span style="font-weight: bold;">mrun</span> allows to specify
     71<span style="font-weight: bold;">mrun</span> allows
     72to specify
    9473individual path names for each simulation and
    9574for the different types of input/output files. The start of model runs
    9675with <b>mrun</b> is described in <a href="chapter_3.1.html">chapter
    97763.1</a>. </p>
    98 <p style="line-height: 100%;">The implementation of user code
     77<p style="line-height: 100%;">The implementation of user
     78code
    9979extensions in
    10080the model is made possible by a set of defined interfaces. You will
    101 find references to the programming of such extensions in <a
    102  href="chapter_3.5.html">chapter
    103 3.5</a>. Frequently errors arise during the execution of the model
     81find references to the programming of such extensions in <a href="chapter_3.5.html">chapter
     823.5</a>. Frequently errors arise during the execution of the
     83model
    10484after such changes, which can often be found only by interactive
    10585model steering and error tracing (debugging), which are described in
    10686<a href="chapter_3.6.html">chapter
    107873.6</a>. </p>
    108 <hr>
    109 <p style="font-style: normal; line-height: 100%;"><br>
    110 <font color="#000080"><font color="#000080"><a href="chapter_2.0.html"><font
    111  color="#000080"><img src="left.gif" name="Grafik1" align="bottom"
    112  border="2" height="32" width="32"></font></a><a href="index.html"><font
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    117 <br>
    118 </p>
    119 <p style="font-style: normal; line-height: 100%;"><span
    120  style="font-style: italic;">Last change:</span> 14/04/05 (SR)<br>
    121 </p>
    122 </body>
    123 </html>
     88<hr><p style="font-style: normal; line-height: 100%;"><br>
     89<font color="#000080"><font color="#000080"><a href="chapter_2.0.html"><font color="#000080"><img src="left.gif" name="Grafik1" align="bottom" border="2" height="32" width="32"></font></a><a href="index.html"><font color="#000080"><img src="up.gif" name="Grafik2" align="bottom" border="2" height="32" width="32"></font></a><a href="chapter_3.1.html"><font color="#000080"><img src="right.gif" name="Grafik3" align="bottom" border="2" height="32" width="32"></font></a></font></font><br>
     90</p><p style="font-style: normal; line-height: 100%;"><span style="font-style: italic;">Last change:</span>
     91$Id$<br>
     92</p></body></html>
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