Representation of complex topography in cartesian coordinate atmospheric meso-scale numerical model

Imei Shiya, H. Ueda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We intend to develop an atmospheric meso-scale numerical model, which is expected to suitably treat the steep topography and complex objects on the earth's surface with a finer resolution. In this work, the finite volume method(FVM) in conjunction with the SIMPLER(Semi-Implicit Method for Pressure-Linked Equation Revised) algorithms is used for calculations of the unsteady, three-dimensional, compressible Navier-Stokes equations on a staggered grid. Abandoning the customary terrain-following normalization, we choose the Cartesian coordinate in which the height is used as the vertical one. Blocking-off method is introduced to handle all of the steep topography and complex objects above the earth's sea-mean level. For the spatial and temporal discretizations, higher-order upwind convection scheme is employed, and fully time implicit scheme is utilized. As a preliminary test, the model has been run on flows over a cube mounted on surface. Result of simulations is present, which shows the potential of our proposed approaches for the next-generation atmospheric meso-scale model development.

Original languageEnglish
Title of host publicationAir Pollution X
EditorsJ.W.S. Longhurst, C.A. Brebbia, J.F. Martin-Duque
Pages279-287
Number of pages9
Publication statusPublished - 2002 Dec 1
EventTenth International Conference on Modelling, Monitoring and Management of Air Pollution, Air Pollution X - Segovia, Spain
Duration: 2002 Jul 12002 Jul 3

Publication series

NameAdvances in Air Pollution
Volume11

Other

OtherTenth International Conference on Modelling, Monitoring and Management of Air Pollution, Air Pollution X
CountrySpain
CitySegovia
Period02/7/102/7/3

ASJC Scopus subject areas

  • Engineering(all)

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