Open AccessNon‐hydrostatic atmospheric cut cell model on a block‐structured mesh
Author(s) -
Yamazaki Hiroe,
Satomura Takehiko
Publication year - 2011
Publication title -
atmospheric science letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 45
ISSN - 1530-261X
DOI - 10.1002/asl.358
Subject(s) - cartesian coordinate system , advection , grid , hydrostatic equilibrium , conservation of mass , simple (philosophy) , block (permutation group theory) , regular grid , polygon mesh , computer science , matching (statistics) , curvilinear coordinates , flow (mathematics) , cube (algebra) , geometry , algorithm , mechanics , computational science , mathematics , physics , philosophy , statistics , epistemology , quantum mechanics , thermodynamics
A block‐structured Cartesian mesh approach based on the Building‐Cube Method is implemented into a 2D non‐hydrostatic atmospheric cut cell model to obtain high near‐ground resolution using Cartesian coordinates. A simple flux‐matching algorithm is introduced that ensures mass conservation across varying grid resolutions in a subcycling time integration. Results of simple diffusion and advection problems show that the method produces sufficiently accurate results with high computational efficiency. The developed model successfully reproduces a flow over a semicircular mountain on a locally refined mesh around the mountain. The result agrees well with that using a uniformly fine mesh. Copyright © 2011 Royal Meteorological Society