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Changes between Version 16 and Version 17 of gallery/movies


Ignore:
Timestamp:
Sep 14, 2010 4:03:07 PM (14 years ago)
Author:
maronga
Comment:

--

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  • gallery/movies

    v16 v17  
    4141||Grid spacing (x|y|z):||25m x 25m x 25m||
    4242||Number of grid points (x|y|z):||80 x 80 x 80||
    43 ||Simulated time:||3600 s||
    44 ||CPU-time:||176||
     43||Simulated time:||1h||
     44||CPU-time:||176h||
    4545||Number of CPUs:||32||
    4646||Machine/ processor type:||SGI Altix ICE at HLRN / Intel Xeon Gainestown||
    … …  
    8989The simulation and particle features are the same as for the second sequence, but here only a part of the horizontal domain with a size of 400 m x 400 m is shown. The fine grid spacing allows to resolve vortex-like structures which develop within the convergence lines. Some of them are part of dust-devil-like vortices (see next sequence).
    9090||||='''Model Setup'''  =||
    91 ||Total domain size (x|y|z):||m x m x m||
    92 ||Grid spacing (x|y|z):||m x m x m||
    93 ||Number of grid points (x|y|z):|| x x ||
    94 ||Simulated time:|| s||
     91||Total domain size (x|y|z):||4096.0m x 4096.0m x 1859.7m||
     92||Grid spacing (x|y|z):||2m x 2m x 2m||
     93||Number of grid points (x|y|z):||2048 x 2048 x 450||
     94||Simulated time:||900s||
     95||CPU-time:||4.8h||
     96||Number of CPUs:||2048||
     97||Machine/ processor type:||SGI Altix ICE at HLRN / Intel Xeon Gainestown||
     98}}}
     99
     100
     101\\
     102
     103
     104||||='''Fourth sequence: dust devils (2006)''' =||
     105{{{#!td style="vertical-align:top; border: 0px solid"
     106{{{#!html
     107<embed
     108    type="application/x-shockwave-flash"
     109    id="player"
     110    name="player"
     111    src="http://palm.muk.uni-hannover.de/chrome/site/gallery/player.swf"
     112    width="512"
     113    height="368"
     114    allowfullscreen="true"
     115    flashvars="file=http://palm.muk.uni-hannover.de/chrome/site/gallery/movies/dust_devil.flv&image=http://palm.muk.uni-hannover.de/chrome/site/gallery/movies/dust_devil_preview.jpg"
     116/>
     117}}}
     118}}}
     119{{{#!td style="vertical-align:top; border: 0px solid""
     120'''Project:''' [[#|LES of dust devils]]\\
     121\\
     122'''Responsible:''' [[imuk/members/franke|Theres Franke]]\\
     123\\
     124'''Description:''' \\
     125This animation displays 3d-views of the lower 150m of the same convective boundary layer as shown before. Particles are released near the surface in those areas, where the dynamic pressure is below a specified threshold of -2 Pa. This allows to visualize dust-devil like vortices, which always have a pressure minimum in their center. The particle color displays the magnitude of horizontal velocity (red: fast, blue: slow). At the end of the sequence, two dust devils with opposite rotation collide and cancel out each other due to conservation of angular momentum.
     126||||='''Model Setup'''  =||
     127||Total domain size (x|y|z):||768m x 768m x 768m||
     128||Grid spacing (x|y|z):||2m x 2m x 2m||
     129||Number of grid points (x|y|z):||384 x 384 x 384||
     130||Simulated time:||1h||
    95131||CPU-time:||||
    96132||Number of CPUs:||||
    97 ||Machine/ processor type:||||
    98 }}}
    99 
    100 
    101 \\
    102 
    103 
    104 ||||='''Fourth sequence: dust devils (2006)''' =||
    105 {{{#!td style="vertical-align:top; border: 0px solid"
    106 {{{#!html
    107 <embed
    108     type="application/x-shockwave-flash"
    109     id="player"
    110     name="player"
    111     src="http://palm.muk.uni-hannover.de/chrome/site/gallery/player.swf"
    112     width="512"
    113     height="368"
    114     allowfullscreen="true"
    115     flashvars="file=http://palm.muk.uni-hannover.de/chrome/site/gallery/movies/dust_devil.flv&image=http://palm.muk.uni-hannover.de/chrome/site/gallery/movies/dust_devil_preview.jpg"
    116 />
    117 }}}
    118 }}}
    119 {{{#!td style="vertical-align:top; border: 0px solid""
    120 '''Project:''' [[#|LES of dust devils]]\\
    121 \\
    122 '''Responsible:''' [[imuk/members/franke|Theres Franke]]\\
    123 \\
    124 '''Description:''' \\
    125 This animation displays 3d-views of the lower 150m of the same convective boundary layer as shown before. Particles are released near the surface in those areas, where the dynamic pressure is below a specified threshold of -2 Pa. This allows to visualize dust-devil like vortices, which always have a pressure minimum in their center. The particle color displays the magnitude of horizontal velocity (red: fast, blue: slow). At the end of the sequence, two dust devils with opposite rotation collide and cancel out each other due to conservation of angular momentum.
    126 ||||='''Model Setup'''  =||
    127 ||Total domain size (x|y|z):||m x m x m||
    128 ||Grid spacing (x|y|z):||m x m x m||
    129 ||Number of grid points (x|y|z):|| x x ||
    130 ||Simulated time:|| s||
    131 ||CPU-time:||||
    132 ||Number of CPUs:||||
    133 ||Machine/ processor type:||||
    134 }}}
     133||Machine/ processor type:||IBM Regatta / Power 4||
     134}}}
     135
    135136
    136137----
    … …  
    175176In the animations the island consists of a single Gaussian shaped mountain with a height of about 1.3 km and a base diameter of about 12km. Particles are released in one layer and act as passive tracers. Their vertical motion is disabled. The colour of the particles reflects the difference between the temperature at the respective particle position and the mean temperature, horizontally averaged over the total domain. Blue/red colours represent a relatively low/high temperature. The animation shows that the cores of the eddies are warmer than the environment. The length of the animation corresponds to about 14h real time.
    176177||||='''Model Setup'''  =||
    177 ||Total domain size (x|y|z):||m x m x m||
    178 ||Grid spacing (x|y|z):||m x m x m||
    179 ||Number of grid points (x|y|z):|| x x ||
    180 ||Simulated time:|| s||
    181 ||CPU-time:||||
    182 ||Number of CPUs:||||
    183 ||Machine/ processor type:||||
     178||Total domain size (x|y|z):||144km x 60.8km x 3.8km||
     179||Grid spacing (x|y|z):||100m x 100m x 100m||
     180||Number of grid points (x|y|z):||1440 x 608 x 32||
     181||Simulated time:||14h||
     182||CPU-time:||1.1h||
     183||Number of CPUs:||256||
     184||Machine/ processor type:||SGI Altix ICE at HLRN / Intel XEON Harpertown||
    184185}}}
    185186
    … …  
    212213Leads in sea ice are responsible for most of the latent and sensible heat transfer from ocean to atmosphere within the marginal ice zones. The animation displays a flow along x (from left to right with a geostrophic wind of about 3 m/s) from sea ice over a lead of 1000m width. The incoming flow is laminar (without turbulence), neutrally stratified, and capped by an inversion above 300m. The surface temperature of ice is assumed to be -23.3C, while the open sea water has a temperature near the freezing point of about -3C. Particles are released near the surface and closely below the inversion. The particle color reflects the buoyancy at the current particle position (red: positive, blue: negative). The particle size is proportional to the magnitude of the vertical velocity component. Cyclic boundary conditions along y are assumed. Convection is generated above the lead but the flow re-stratifies soon after passing the lead. The spatial resolution of the model is still insufficient to resolve the turbulent convection above the first half (upstream part) of the lead.
    213214||||='''Model Setup'''  =||
    214 ||Total domain size (x|y|z):||m x m x m||
    215 ||Grid spacing (x|y|z):||m x m x m||
    216 ||Number of grid points (x|y|z):|| x x ||
    217 ||Simulated time:|| s||
    218 ||CPU-time:||||
    219 ||Number of CPUs:||||
    220 ||Machine/ processor type:||||
    221 }}}
     215||Total domain size (x|y|z):||5760m x 1280m x 1477m||
     216||Grid spacing (x|y|z):||10m x 10m x 10m||
     217||Number of grid points (x|y|z):||576 x 128 x 66||
     218||Simulated time:||45min||
     219||CPU-time:||2600s||
     220||Number of CPUs:||32||
     221||Machine/ processor type:||IBM-Regatta / Power4||
     222}}}
     223
    222224
    223225----
    … …  
    260262This animation shows the turbulent flow field generated by a single cube with an edge length of 50m. The initial flow is laminar (from left) with a mean speed of 1 m/s, and neutrally stratified. The particle color displays the height above ground (red: high, blue: low). The wake vortex behind the building is especially dominant. The side view also shows the evolution of a roof vortex. Since cyclic boundary conditions along x and y are used, the turbulence generated on the lee side of the building hits the building again from the luv side after some time.
    261263||||='''Model Setup'''  =||
    262 ||Total domain size (x|y|z):||m x m x m||
    263 ||Grid spacing (x|y|z):||m x m x m||
    264 ||Number of grid points (x|y|z):|| x x ||
    265 ||Simulated time:|| s||
    266 ||CPU-time:||||
    267 ||Number of CPUs:||||
    268 ||Machine/ processor type:||||
    269 }}}
     264||Total domain size (x|y|z):||960m x 320m x 150m||
     265||Grid spacing (x|y|z):||5m x 5m x 5m||
     266||Number of grid points (x|y|z):|| 192 x 64 x 30||
     267||Simulated time:||1h||
     268||CPU-time:||155s||
     269||Number of CPUs:||8||
     270||Machine/ processor type:||NEC-SX6||
     271}}}
     272
    270273
    271274----
    … …  
    297300Turbulent flow around a city quarter of Hannover. The mean flow is from west (right) with a speed of 1 m/s (neutral stratification is assumed). Clouds of particles are periodically released in front of the large building (Allianz tower) and in the courtyard of another complex of buildings. The particle color reflects the height above ground (red: high, blue: low). Topography data are from laser altimeter measurements (kindly provided by the Institut für Kartographie und Geoinformatik, Leibniz Universit�ät Hannover). The resolution of the laser data allows to resolve cars on the street west of the Allianz building, staying there because of a red traffic light. The sequence shows that the turbulent flow within street canyons is highly variable so that flow directions may change completely within short times.
    298301||||='''Model Setup'''  =||
    299 ||Total domain size (x|y|z):||m x m x m||
    300 ||Grid spacing (x|y|z):||m x m x m||
    301 ||Number of grid points (x|y|z):|| x x ||
    302 ||Simulated time:|| s||
    303 ||CPU-time:||||
    304 ||Number of CPUs:||||
    305 ||Machine/ processor type:||||
    306 }}}
    307 
    308 
    309 \\
     302||Total domain size (x|y|z):||256m x 256m x 200m||
     303||Grid spacing (x|y|z):||1m x 1m x 1m||
     304||Number of grid points (x|y|z):||256 x 256 x 200||
     305||Simulated time:||1h||
     306||CPU-time:||1800s||
     307||Number of CPUs:||32||
     308||Machine/ processor type:||IBM-Regatta / Power4||
     309}}}
     310
     311
     312\\
                                                                                                                                                                                                                                                                                                                                                                               
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