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Home arrow Test cases
Test cases

GETM has been validated with a number of observations from idealised scenarios and different oceanic regimes. The corresponding "test-cases" can be downloaded from this page. Test cases are available from the table below. Installation instructions are provided here to guarantee a successful installation.

Download test cases for different versions of GETM on the Page "Download test cases" in the menu. To see additional information about the test cases see "Read more..." and a movie of each simulation, click on the image.



Box spherical test case
bathy_spher2

 

This test case contains a little box with a parabolic bottom topography. It's lateral boundaries are lines of constant latitude and longitude,respectively. The size of this box corresponds approximately to that of the "nice_little_box" in Cartesian coordinates. Stratificationfrom "tprof.dat" corresponds to a two-layer fluid. The flow is driven by a constant wind from west.

It is created by Lars Umlauf to test horizontal coordinate systems in GETM.

Last Updated ( Monday, 09 July 2007 )
Read more...
 
Box cartesian test case
bathy_cart

 

This test case contains a little rectangular box with a parabolic bottom topography. Stratification from "tprof.dat" corresponds to a two-layer fluid. The flow is driven by a constant wind from west or, which is almost the same in this case, in the x-direction. The run's duration is 10 days, during which you can see some nice Poincare-type waves in the basin, some upwelling at the northern shore,and the initiation of a non-linear Kelvin-type wave in the upwelling region.

It is created by Lars Umlauf to test horizontal coordinate systems in GETM.

Last Updated ( Monday, 09 July 2007 )
Read more...
 
Box curvilinear test case
bathy_curv

 

This test case contains a little curved channel with a parabolic bottom topography. Stratification from "tprof.dat" corresponds toa two-layer fluid. The flow is driven by a constant wind from west if "topo.nc" is used as bathymetry file. Alternatively, if "topo_min.nc"is used, the wind blows into the local x-direction of the curvilinear grid (see below).

It is created by Lars Umlauf to test horizontal coordinate systems in GETM.

Last Updated ( Monday, 09 July 2007 )
Read more...
 
Haidvogel

haidThe Haidvogel test case is a so called lock exchange test experiment. In this test case a 20m deep closed rectangular basin of 65km length with vertical walls,  containing two fluids with a density difference of 5kg/m³, is separated by a vertical interface in the centre. The interface is removed at t=0. Due to the internal pressure gradient,  the dense water is behaving like a gravity current moving below the lighter water (see animation). The simulation runs without Coriolis force (latitude=0°N, see getm.inp).  The bathymetry is meant to be a two-dimensional slice.

Last Updated ( Friday, 01 June 2007 )
Read more...
 
Upwelling test case

upwelling To demonstrate how GETM runs as a slice model in x-direction, an upwelling test case with stable temperature stratification in a parabolic (in x-direction) channel and a wind stress of 0.2 N/m**2 in the channel direction (positive y-axis) is given. After some hours, strong upwelling occurs at the left shore, while there is downwelling a the right shore. See movie of simulation.

Last Updated ( Friday, 01 June 2007 )
Read more...
 
Freshwater lense test case

freshwater Here, a lens of relative low salinity is placed on top of,ddenser ambient water initially at rest. This test case has been suggested by Tartinville et al. (1998) for the NOMADS concerted action within the MAST-III programme of the European Communities.
In this project various numerical shelf sea models for the North Sea  have been compared.

Last Updated ( Friday, 01 June 2007 )
Read more...
 
Interleaving Test case

interleaving_start This test case is called interleaving, because it simulates the sandwiching (or interleaving) of a dense bottom current into a stably stratified fluid. (see movie of simulation)

 The bathymetry is meant to be a two-dimensional slice (xz-plain, no rotation) from the entrance area into the Baltic Sea,
Last Updated ( Monday, 04 June 2007 )
Read more...
 
Seamount test case
seamount_tempThis test case originally was applied to show problems in numerical schemes (advection, pressure gradient, time stepping,...) of ocean models in a simulation of a channel flow over and around a tall seamount (see movie of sea surface elevation).
Last Updated ( Friday, 01 June 2007 )
Read more...
 
Sylt test case
sylt_bathymetry

 

The Sylt test case provides a simulation with open boundary conditions to the north and west prescribing the tidal signal for three periods (see movie of simulation). Very nicely the ability of GETM simulating the tidal flats with drying and flooding can be seen. To see a movie of the simulation please mouse-click on the image below.

Last Updated ( Monday, 09 July 2007 )
Read more...
 
North Sea test case

bathy2The North Sea 6nm cartesian test case is the most complicated case provided. The setup gives a fully baroclinic annual simulation + 3 month of spinup simulations with rivers, meteo-forcing, open boundaries. Each month will be simulated separately and 'hotstart' files will be used.

Last Updated ( Friday, 08 June 2007 )
Read more...
 
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