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SUMMARY:2D and 3D simulations of a nonhydrostatic atmospheric model on a b
 lock-structured Cartesian mesh - Hiroe Yamazaki\,   (University of Cambrid
 ge)
DTSTART:20120926T091500Z
DTEND:20120926T094000Z
UID:TALK40142@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Under the rapid development of computing power\, this study ai
 ms at developing a next-generation atmospheric model for ultra-high resolu
 tion simulations at horizontal grid intervals of less than 100 meters. Rec
 ently\, Cartesian grids are drawing attention as an attractive choice for 
 high-resolution atmospheric models that need to handle steep slopes in mou
 ntainous areas. They have the advantage of avoiding errors because of the 
 slantwise orientation of grid lines in models using conventional terrain-f
 ollowing grids. In our model\, a cut cell method is used for representing 
 topography on a Cartesian grid. Also\, a block-structured mesh approach is
  introduced to achieve computationally efficient Cartesian grid simulation
 s with both high vertical resolution near the ground and reasonable conser
 vation characteristics. \n\nThe result of a 2D numerical simulation shows 
 the model successfully reproduces a flow over a semi-circular mountain on 
 a locally refined mesh around the mountain. The result agrees well with th
 at using a uniformly fine mesh. Some recent 3D results of our model will a
 lso be discussed. \n\n
LOCATION:Seminar Room 1\, Newton Institute
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