Changes between Version 155 and Version 156 of WikiStart


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Timestamp:
Dec 14, 2017 11:58:48 AM (7 years ago)
Author:
maronga
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  • WikiStart

    v155 v156  
    1 = PALM =
    2 [[TracNav(toc)]]
    3 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).
     1= The PALM model system =
     2[[NoteBox(warn,The PALM web page is currently under reconstruction and will be successively updated within the next days!)]]
     3
     4
     5[[TracNav(toc2)]]
     6PALM is an advanced and modern meteorological model system for atmospheric and oceanic boundary-layer flows. It has been developed as a turbulence-resolving large-eddy simulation (LES) model that is especially designed for performing on massively parallel computer architectures. Since PALM 5.0, the model is shipped along with several PALM-4U (PALM for urban applications, read: ''PALM for you'') components that allow to employ the model for various urban applications ranging from the meso- to the microscale.
     7
     8The PALM model system is free software. It can be redistributed and/or modified under the terms of the GNU General Public License (v3).
     9
     10----
     11PALM is regularly tested. The test status of the current revision is: [[Image(https://testserver.palm-model.org/buildStatus/icon?job=palm_trunk)]] More details [[wiki:doc/tec/testsuite|here]]
     12
     13----
     14
     15== PALM  ==
     16The model PALM consists of a dynamic solver for the Navier-Stokes equations and the first law of thermodynamics. By default, the model is used in an LES mode in which the bulk of the turbulent motions in the atmospheric boundary are explicitly resolved.
     17
    418{{{
    519#!div style="align:'left'; width: 300px; border: 0px solid; float:right"
    620[[Image(htdocs:gallery/palm_logo_200px.jpg,nolink)]]
    721}}}
    8 '''Some of PALM's highlights are'''
    922
     23Further highlights and features of the PALM core are
    1024* excellent scaling, so far tested up to 32,000 cores
     25* complex terrain is realized on a Cartesian grid (allows for steep orography and vertically oriented buildings)
    1126* on-the-fly data analysis (during model runs) in order to avoid I/O bottlenecks
    12 * topography realized on Cartesian grid (allows for steep topography)
    13 * interactive land surface model, coupled to the RRTMG radiation code
    14 * non-cyclic horizontal boundary conditions including turbulent inflow
     27* interactive land surface model, coupled to the RRTMG radiation model
    1528* wind turbine model (ADM-R) is implemented
    1629* code can be switched to ocean version with salinity equation and equation of state for seawater
    1730* embedded parallelized Lagrangian particle model for various applications (footprint calculation, simulation of cloud droplet growth, visualization, etc.)
    1831* interface allowing users to plug in their own code extensions without modifying the default code
    19 * advanced shell scripts for installing and running the code in interactive and batch mode are available
    20 * code is permanently maintained and improved by the PALM group and other users; code management is based on subversion
     32----
    2133
    22 PALM is regularly tested. The test status of the current revision is: [[Image(https://testserver.palm-model.org/buildStatus/icon?job=palm_trunk)]] More details [[wiki:doc/tec/testsuite|here]]
     34== PALM-4U components ==
     35For urban applications, the PALM-4U components offer a variety of capabilities and features to answer research questions and to tackles issues in modern city planning related to the urban microclimate and climate change. Above all, this includes the representation of buildings on a Cartesian grid at grid spacings down to 1 m and below. PALM-4U components are shipped with PALM and are available after installation of PALM. PALM-4U components are thus also available in PALM and might be used without being limited to urban area applications. Per definition, starting from PALM version 5.0, the user runs PALM-4U as soon as buildings are placed within the model domain and at least one of the following PALM-4U components is used:
    2336
    24 ----
     37{{{
     38#!div style="align:'left'; width: 200px; border: 0px solid; float:right"
     39[[Image(PALM-4U_logo.png,200px,https://uc2-mosaik.org)]]
     40}}}
     41
     42* Energy balance solvers for building and paved surfaces
     43* Radiative transfer within the urban canopy layer, including shadowing effects and multiple reflections between urban structures
     44* Wall material model for heat transfer between atmosphere and building
     45* Indoor climate module, predicting indoor temperature, energy demand, and waste heat
     46* Chemistry module for the transport and conversion of reactive species
     47* Model self-nesting that allows to increase either model domain size or to focus on near-surface processes
     48* A multi-agent system for urban residents, allowing for biometeorological studies and escape scenarios
     49* Quasi-automatic external forcing by COSMO-DE model data
     50* A Reynolds-averaged Navier Stokes (RANS) type turbulence parameterization can be used instead of LES to reduce computational costs
     51* Analysis tools and direct output of biometeorological quantities
     52
     53The PALM-4U components are have been and will be further developed by a consortium of institutions within the framework of the funding programme "[UC²] - Urban climate under change", funded by the German Federal Ministry of Education and Research (BMBF). For more information, see [http://uc2-mosaik.org].
     54
     55
    2556'''PALM news'''
    2657{{{#!comment
     
    3061#############################################
    3162}}}
    32    '''[ 2017-11-22 ]''' ''The Karl Doetsch Young Scientist Award ''([[https://www.tu-braunschweig.de/forschung/zentren/nfl/preise| award details]])'' for outstanding theses was awarded to Sebastian Giersch this year for his Master thesis titled ''Flight Simulations in LES Generated Near-Surface Turbulent Wind Fields''([attachment:PB223192.JPG photo]). Official information can be found ''([[https://www.tu-braunschweig.de/forschung/zentren/nfl/forschungstage/forschungstag2017| here]])'' ''\\
    33    '''[ 2017-06-02 ]''' ''This years PALM seminar is held at the Institute of Meteorology and Climatology, Leibniz Universität Hannover, 25th - 29th September ([attachment:Announcement_PALMseminar2017.pdf details]).''\\
     63   '''[ 2017-12-15 ]''' ''Release of PALM 5.0 with PALM-4U components (beta)''\\
     64   '''[ 2017-06-02 ]''' ''This years PALM seminar is held at the Institute of Meteorology and Climatology, Leibniz Universität Hannover, 25th - 29th September ([attachment:Announcement_PALMseminar2017.pdf details])''\\
    3465   '''[ 2017-05-30 ]''' ''New topography and surface-modeling concept implemented ([[wiki:doc/tec/topography#topo|details]]).''\\
    35    '''[ 2017-02-10 ]''' ''PALM celebrates 10 years of code development using SVN.''\\
    36    '''[ 2016-10-26 ]''' ''PALM now features an anelastic approximation for its model equations. This paves the way for the simulation of deep convective clouds with PALM ([[wiki:doc/app/inipar#approximation|details]])''.\\
    3766----
    3867'''PALM users world map'''[[FootNote(The world map shows groups that work with PALM and that have published at least one paper. You want to be listed in the map? Let [mailto:maronga@muk.uni-hannover.de us] know!)]]