= PALM - A '''PA'''rallelized '''L'''arge-Eddy Simulation '''M'''odel for Atmospheric and Oceanic Flows =
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PALM is a large-eddy simulation (LES) model for atmospheric and oceanic flows which is especially designed for performing on massively parallel computer architectures. PALM is free software. It can be redistributed and/or modified under the terms of the GNU General Public License (v3).
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{{{#!html
<a href='gallery/movies1'>
<embed
    type="application/x-shockwave-flash"
    id="player"
    name="player"
    src="http://palm.muk.uni-hannover.de/chrome/site/gallery/player.swf" 
    width="300" 
    height="154"
    allowfullscreen="false"
    flashvars="file=http://palm.muk.uni-hannover.de/chrome/site/gallery/movies/palm_2.flv&image=http://palm.muk.uni-hannover.de/chrome/site/gallery/movies/palm_2_preview.jpg&autostart=true&controlbar=none&repeat=always"
/></a><br>
A PALM simulation using the letters "PALM" as surface heat flux pattern. Check out the <a href='gallery/movies'>gallery</a> for more movies!
}}}
}}} 
'''Some of PALM's highlights are'''

* excellent scaling, so far tested up to 32000 cores
* online data analysis (during model runs) in order to avoid I/O bottlenecks
* topography realized on cartesian grid (allows for steep topography)
* non-cyclic horizontal boundary conditions including turbulent inflow
* code can be switched to ocean version with salinity equation and equation of state for seawater
* embedded parallelized Lagrangian particle model for various applications (footprint calculation, simulation of cloud droplet growth, visualization, etc.)
* interface which allows users to plug in their own code extensions without modifying the default code
* advanced shell scripts for installing and running the code in interactive and batch mode are available
* code is permanently maintained and improved by the PALM group and other users; code management is based on subversion

'''Access'''

If you are interested in using or just testing the code, just send an [[mailto:raasch@muk.uni-hannover.de|email]] including a username and a password that you like to use to access the code. This account will also allow you to login on this trac-server, e.g. to submit trouble tickets, or to edit the wiki, if you have proper access permissions. As a registered user, you will also be informed about new PALM updates by email.

We appreciate any comments on the contents of this server which may help us to improve our documentation. Please contact us by [[mailto:raasch@muk.uni-hannover.de|email]] or just send a ticket, if you are a registered user.

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   '''News from the PALM Group'''\\\\
   '''[ 2013/07/22 ]''' ''Improved animation of dust devils has been added[[gallery/movies|gallery]]''\\
   '''[ 2013/06/28 ]''' ''First announcement of this year's PALM seminar in Hong Kong. ([[seminar_2013|see here]])''\\
   '''[ 2012/10/23 ]''' ''Watch the presentation 'Atmosphärische Turbulenz sichtbar machen' at !IdeenExpo 2011 [[https://www.youtube.com/watch?v=3IHH0Vqb3P4|here]] (in german)'' \\
   '''[ 2012/10/22 ]''' ''Code has been put under the GPL starting from version 3.9 (r1036)'' \\

   '''Latest PALM Revision Change'''\\\\
   '''[ [[CRev(1)]] ]''' by user [[CRev(2)]] (''[[CRev(3)]]'', see [[changeset:| changeset]])
}}}