= LES of cumulus clouds =
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== Development of cumulus clouds (2012) #cumulusdev
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'''Project:''' [[wiki:imuk/projects/2008_02|Investigations on in-cloud turbulence effects on drop growth and precipitation formation]]\\
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'''Responsible:''' [[imuk/members/franke|Theres Riechelmann]], [[imuk/members/maronga|Björn Maronga]]\\
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'''Description:''' This sequence shows the development of cumulus clouds at an accelerated pace in the homogeneously-heated convective boundary layer. The shown time period spans approx. 80 minutes, the shown region is of size 1.4 km x 1.4 km in the horizonzal and 1.5 km in the vertical direction. The clouds are represented through the liquid water content. Darker (gray) shades refer to a higher water content than white shades. The background scenary here is not physical and used for decorational reasons only.\\
||||='''Model Setup''' =||
||Total domain size (x|y|z):||4096m x 4096m x 1900m||
||Grid spacing (x|y|z):||4m x 4m x 4m||
||Number of grid points (x|y|z):||1024 x 1024 x 448||
||Simulated time:||2h||
||CPU-time:||6.5h||
||Number of CPUs:||1024||
||Machine/ processor type:||SGI Altix ICE at [https://www.hlrn.de/home/view/Service HLRN]||
||Visualization software:||VAPOR||
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||||||='''Download''' =||
||Video Format ||File size ||
||Flash (.flv) || 3.9mb||[[htdocs:gallery/movies/cloud1_flash.flv|Download]] ||
||MPEG (.avi) || 3.6mb||[[htdocs:gallery/movies/cloud1_mpeg.avi|Download]] ||
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== Up- and downdrafts below a cumulus cloud (2012) #updowndraft
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'''Project:''' [[wiki:imuk/projects/2008_02|Investigations on in-cloud turbulence effects on drop growth and precipitation formation]]\\
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'''Responsible:''' [[imuk/members/franke|Theres Riechelmann]], [[imuk/members/maronga|Björn Maronga]]\\
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'''Description:''' As sequence one, but a different cloud at a different location. The shown region is of size 1.0 km x 1.2 km in the horizonzal and 1.5 km in the vertical direction; the shown time period is 10 min (each time step is 0.6 s). The arrows indicate the strength and direction of the wind in a vertical plane through the center of the cloud. Red and blue colors refer for up- and downdrafts, respectively.\\
||||='''Model Setup''' =||
||Total domain size (x|y|z):||4096m x 4096m x 1900m||
||Grid spacing (x|y|z):||4m x 4m x 4m||
||Number of grid points (x|y|z):||1024 x 1024 x 448||
||Simulated time:||2h||
||CPU-time:||6.5h||
||Number of CPUs:||1024||
||Machine/ processor type:||SGI Altix ICE at [https://www.hlrn.de/home/view/Service HLRN]||
||Visualization software:||VAPOR||
\\
||||||='''Download''' =||
||Video Format ||File size ||
||Flash (.flv) || 4.3mb||[[htdocs:gallery/movies/cloud2_flash.flv|Download]] ||
||MPEG (.avi) || 10.9mb||[[htdocs:gallery/movies/cloud2_mpeg.avi|Download]] ||
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== Up- and downdrafts below a cumulus cloud 3D #updowndraft3d
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}}}
'''Project:''' [[wiki:imuk/projects/2008_02|Investigations on in-cloud turbulence effects on drop growth and precipitation formation]]\\
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'''Responsible:''' [[imuk/members/franke|Theres Riechelmann]], [[imuk/members/maronga|Björn Maronga]]\\
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'''Description:''' The third sequence shows the same cloud as sequence two, but from a different view angle. Arrows again indicate the flow circulation under the cloud (updrafts are in red colors). The bottom shows the near-surface vertical wind speed (high wind speeds in red).\\
||||='''Model Setup''' =||
||Total domain size (x|y|z):||4096m x 4096m x 1900m||
||Grid spacing (x|y|z):||4m x 4m x 4m||
||Number of grid points (x|y|z):||1024 x 1024 x 448||
||Simulated time:||2h||
||CPU-time:||6.5h||
||Number of CPUs:||1024||
||Machine/ processor type:||SGI Altix ICE at [https://www.hlrn.de/home/view/Service HLRN]||
||Visualization software:||VAPOR||
\\
||||||='''Download''' =||
||Video Format ||File size ||
||Flash (.flv) || 4.2mb||[[htdocs:gallery/movies/cloud1_flash.flv|Download]] ||
||MPEG (.avi) || 10.9mb||[[htdocs:gallery/movies/cloud1_mpeg.avi|Download]] ||
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