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GEOSIM: A numerical model for geophysical fluid flow simulationA numerical model which simulates geophysical fluid flow in a wide range of problems is described in detail, and comparisons of some of the model's results are made with previous experimental and numerical studies. The model is based upon the Boussinesq Navier-Stokes equations in spherical coordinates, which can be reduced to a cylindrical system when latitudinal walls are used near the pole and the ratio of latitudinal length to the radius of the sphere is small. The equations are approximated by finite differences in the meridional plane and spectral decomposition in the azimuthal direction. The user can specify a variety of boundary and initial conditions, and there are five different spectral truncation options. The results of five validation cases are presented: (1) the transition between axisymmetric flow and baroclinic wave flow in the side heated annulus; (2) the steady baroclinic wave of the side heated annulus; (3) the wave amplitude vacillation of the side heated annulus; (4) transition to baroclinic wave flow in a bottom heated annulus; and (5) the Spacelab Geophysical Fluid Flow Cell (spherical) experiment.
Document ID
19910012137
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Butler, Karen A. (New Technology, Inc., Huntsville AL., United States)
Miller, Timothy L. (NASA Marshall Space Flight Center Huntsville, AL., United States)
Lu, Huei-Iin (Universities Space Research Association Huntsville, AL., United States)
Date Acquired
September 6, 2013
Publication Date
February 1, 1991
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NAS 1.15:103528
NASA-TM-103528
Accession Number
91N21450
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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