Changeset 116 for palm/trunk/DOC


Ignore:
Timestamp:
Oct 11, 2007 2:30:27 AM (15 years ago)
Author:
raasch
Message:

further preliminary updates concerning particle sorting and documentation

Location:
palm/trunk/DOC/app
Files:
3 edited

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  • palm/trunk/DOC/app/chapter_4.1.html

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    22   <title>PALM chapter 4.1</title>
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     21  <title>PALM chapter 4.1</title></head>
    2422
    2523<body>
     
    21532151
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    2155 Cloud droplets require to use the particle package (<span style="font-weight: bold;">mrun</span>-option <span style="font-family: monospace;">-p particles</span>),
    2156 so in this case a particle corresponds to a droplet. The droplet
     2153<span style="font-weight: bold;"></span><span style="font-family: monospace;"></span>
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     2155
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     2158Cloud droplets require to use&nbsp;particles (i.e. the NAMELIST group <span style="font-family: Courier New,Courier,monospace;">particles_par</span> has to be included in the parameter file<span style="font-family: monospace;"></span>). Then each particle is a representative for a certain number of droplets. The droplet
    21572159features (number of droplets, initial radius, etc.) can be steered with
    21582160the&nbsp; respective particle parameters (see e.g. <a href="#chapter_4.2.html#radius">radius</a>).
     
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    12604 </body>
    12605 </html>
     12606</body></html>
  • palm/trunk/DOC/app/chapter_4.2.html

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    1312 
    14   <title>PALM chapter 4.2</title>
    15 </head>
    16 
     13  <title>PALM chapter 4.2</title></head>
    1714
    1815<body>
     
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    8688     <tr>
     8685    <tr><td style="vertical-align: top;"><span style="font-weight: bold;"><a name="dt_sort_particles"></a>dt_sort_particles</span></td><td style="vertical-align: top;">R</td><td style="vertical-align: top;"><span style="font-style: italic;">0.0</span></td><td style="vertical-align: top;">Temporal interval for sorting particles (in s).<br><br>By
     8686default, particles are sorted in memory in a way that their order
     8687follows the order in which the gridpoint values are stored. This may
     8688improve cache coherence in case of larger numbers of particles and
     8689gridpoints. However, since the sorting itself is time consuming and
     8690since the requirement of sorting depends on the strength of mixing in
     8691the flow, performance can be improved if the sorting is applied only
     8692after certain time intervals. The proper length of this interval <span style="font-weight: bold;">dt_sort_particles</span> must be determined empirically by carrying out test runs with different intervals. Check file <a href="chapter_3.4.html#CPU_MEASURES">CPU_MEASURES</a> to find the value of <span style="font-weight: bold;">dt_sort_particles</span> which gives the best performance.<br><br><span style="font-weight: bold;">Note:</span><br>In case of <a href="chapter_4.1.html#cloud_droplets">cloud_droplets</a> = <span style="font-style: italic;">.T.</span>, any given non-zero value of <span style="font-weight: bold;">dt_sort_particles</span> will be reset to zero and a corresponding warning message will appear in the job protocol.</td></tr><tr>
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    11592 </body>
    11593 </html>
     11596</body></html>
  • palm/trunk/DOC/app/chapter_4.6.html

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    17   <title>PALM chapter 4.6</title>
    18   <meta name="GENERATOR" content="StarOffice 7 (Win32)">
     16 
     17  <title>PALM chapter 4.6</title><meta name="GENERATOR" content="StarOffice 7 (Win32)">
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    5049@page { size: 21cm 29.7cm }
    5150-->
    52   </style>
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     51  </style></head>
    5552
    5653<body style="direction: ltr;" lang="en-US">
     
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    3734  <tr>
     3731 <tr><td><a href="chapter_4.2.html#dt_sort_particles"><span style="font-weight: bold;">dt_sort_particles</span></a></td><td>P</td><td>R</td><td><span style="font-style: italic;">0.0</span></td><td>Temporal interval for sorting particles (in s).</td></tr><tr>
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    11822 </body>
    11823 </html>
     11819</body></html>
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