source: palm/trunk/DOC/app/chapter_3.0.html @ 292

Last change on this file since 292 was 97, checked in by raasch, 17 years ago

New:
---
ocean version including prognostic equation for salinity and equation of state for seawater. Routine buoyancy can be used with both temperature and density.
+ inipar-parameters bc_sa_t, bottom_salinityflux, ocean, sa_surface, sa_vertical_gradient, sa_vertical_gradient_level, top_salinityflux

advec_s_bc, average_3d_data, boundary_conds, buoyancy, check_parameters, data_output_2d, data_output_3d, diffusion_e, flow_statistics, header, init_grid, init_3d_model, modules, netcdf, parin, production_e, prognostic_equations, read_var_list, sum_up_3d_data, swap_timelevel, time_integration, user_interface, write_var_list, write_3d_binary

New:
eqn_state_seawater, init_ocean

Changed:


inipar-parameter use_pt_reference renamed use_reference

hydro_press renamed hyp, routine calc_mean_pt_profile renamed calc_mean_profile

format adjustments for the ocean version (run_control)

advec_particles, buoyancy, calc_liquid_water_content, check_parameters, diffusion_e, diffusivities, header, init_cloud_physics, modules, production_e, prognostic_equations, run_control

Errors:


Bugfix: height above topography instead of height above level k=0 is used for calculating the mixing length (diffusion_e and diffusivities).

Bugfix: error in boundary condition for TKE removed (advec_s_bc)

advec_s_bc, diffusion_e, prognostic_equations

  • Property svn:keywords set to Id
File size: 5.4 KB
Line 
1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
2<html><head>
3<meta http-equiv="CONTENT-TYPE" content="text/html; charset=windows-1252"><title>PALM chapter 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>
4<!--
5@page { size: 21cm 29.7cm }
6-->
7</style></head>
8<body style="direction: ltr;" lang="en-US"><h2 style="font-style: normal; line-height: 100%;"><font size="4">3.0
9Execution of model runs</font></h2>
10<p style="line-height: 100%;">Given that the model was
11installed by the user (look at <a href="chapter_5.0.html">chapter
125.0</a>) and that it is clear, which phenomenon is to be
13simulated,
14there is a whole set of questions which must be answered before
15executing
16the actual application run, e.g.: </p>
17<ul> <li> <p style="margin-bottom: 0cm; font-style: normal; line-height: 100%;">How
18large does the model domain have to be and what grid size does
19phenomenon to be simulated require? </p> </li> <li>
20<p style="margin-bottom: 0cm; font-style: normal; line-height: 100%;">How
21long is the time which should be simulated, i.e. which typical time
22scale does the phenomenon have? </p> </li> <li> <p style="margin-bottom: 0cm; font-style: normal; line-height: 100%;">Which
23boundary conditions and initial conditions are to be selected? </p>
24</li> <li> <p style="font-style: normal; line-height: 100%;">Which model
25output data are necessary at which points in time, in order to be able
26to analyze the phenomenon afterwards? </p> </li>
27</ul><p style="line-height: 100%;">The answers to
28these questions
29substantially determine the choice of values for the most important
30model parameters, with which the model run is steered. All possible
31parameters are described in chapters <a href="chapter_4.1.html">4.1</a>,
32<a href="chapter_4.2.html">4.2</a>
33and <a href="chapter_4.3.html">4.3</a>.
34The basic steering of the model with these parameters is explained in
35the introduction to <a href="chapter_4.0.html">chapter
364</a>. The user will rarely use all model parameters, since many
37are
38preset with consistent default values and therefore do not have to be
39changed by the user. Some of the most important parameters are not
40preset with default values and must be adjusted by the user in each
41case. Such a typical, minimum parameter set is described in <a href="chapter_4.4.1.html">chapter
424.4.1</a>. For the subsequent analysis of model runs, graphical
43visualization of model data is particularly important. <a href="chapter_4.5.html">Chapter
444.5</a> describes, how such outputs are produced with the model. </p>
45<p style="line-height: 100%;">The selected parameters and
46their values
47have to be supplied to the model as an input file. The
48structure of this file is described in the introduction to <a href="chapter_4.0.html">chapter
494</a>. The data, produced by the model, are located in a number
50of
51different output files. The model works with relative file names
52(i.e. without absolute path information). Thus all input and output
53files are
54expected and put in the directory, in which the actual model (the
55executable program created from the FORTRAN source code) is started
56(but also see next paragraph).
57All user-relevant input and output files are described in <a href="chapter_3.4.html">chapter
583.4</a>. </p>
59<p style="line-height: 100%;">The actual model (the
60executable
61program) is not started directly via the user, but with the help of
62the shell script <a href="http://www.muk.uni-hannover.de/institut/software/mrun_beschreibung.html">mrun</a>,which
63can be called by the user. This script takes over the entire pre- and
64postprocessing work, which is necessary for a model run. In addition
65to this, it generates e.g. automatically batch jobs for model runs on
66remote computers, provides for the appropriate file transfers of the
67input and output files to these computers, secures data on existing
68archives systems, starts if necessary restart jobs, and much more.
69<span style="font-weight: bold;">mrun</span> allows
70to specify
71individual path names for each simulation and
72for the different types of input/output files. The start of model runs
73with <b>mrun</b> is described in <a href="chapter_3.1.html">chapter
743.1</a>. </p>
75<p style="line-height: 100%;">The implementation of user
76code
77extensions in
78the model is made possible by a set of defined interfaces. You will
79find references to the programming of such extensions in <a href="chapter_3.5.html">chapter
803.5</a>. Frequently errors arise during the execution of the
81model
82after such changes, which can often be found only by interactive
83model steering and error tracing (debugging), which are described in
84<a href="chapter_3.6.html">chapter
853.6</a>. </p>
86<hr><p style="font-style: normal; line-height: 100%;"><br>
87<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>
88</p><p style="font-style: normal; line-height: 100%;"><span style="font-style: italic;">Last change:</span>
89$Id: chapter_3.0.html 97 2007-06-21 08:23:15Z letzel $<br>
90</p></body></html>
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