= PALM - A '''PA'''rallelized '''L'''arge-Eddy Simulation '''M'''odel for Atmospheric and Oceanic Flows =
[[TracNav(toc)]]

PALM is a large-eddy simulation (LES) model for atmospheric and oceanic flows which is especially designed for performing on massively parallel computer architectures. It is free to be used for scientific research.

Some of PALM's highlights are

* excellent scaling, so far tested up to 10000 cores
* online data analysis (during model runs) in order to avoid I/O bottlenecks
* 

The original version of which was developed from 1997-1999 at IMUK. This model is optimized for use on massively parallel computers, and it is therefore very well suited for simulations with an extremely large number of grid points. The current supercomputer of the North German Supercomputing Center "Norddeutscher Verbund für Hoch- und Höchstleistungsrechnen" (HLRN), an SGI-ICE machine with 12000 cores, allows calculations with up to 4096³ grid points. [[BR]]
Our research focusses on the analysis of micro- and mesoscale turbulent boundary layers. Other key parts of our work include numerical improvements of PALM, in particular parallelized numerical schemes, and the development of software systems that are able to effectively visualize the extremely large data amount that is typical of parallelized models.
----

== Getting Help == #gettinghelp 

If you experience problems with PALM or if you like to request new enhancements, feel free to create a [[/newticket|new ticket]] or have a look in our [[tickets]] section. Furthermore, we might provide a list of frequently asked questions (FAQ) in future. 
----

== PALM-related Downloads ==
In the [[/downloads|download section]] you can find documentations of selected parts  of the model source code as well as animations and presentations from workshops.