TY - GEN

T1 - Representation of complex topography in cartesian coordinate atmospheric meso-scale numerical model

AU - Shiya, Imei

AU - Ueda, H.

PY - 2002/12/1

Y1 - 2002/12/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=2942631014&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2942631014&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:2942631014

SN - 1853128228

T3 - Advances in Air Pollution

SP - 279

EP - 287

BT - Air Pollution X

A2 - Longhurst, J.W.S.

A2 - Brebbia, C.A.

A2 - Martin-Duque, J.F.

T2 - Tenth International Conference on Modelling, Monitoring and Management of Air Pollution, Air Pollution X

Y2 - 1 July 2002 through 3 July 2002

ER -