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CHLNDDEV / OceanMesh2D

A two-dimensional triangular mesh generator with pre- and post-processing utilities written in pure MATLAB (no toolboxes required) designed specifically to build models that solve shallow-water equations or wave equations in a coastal environment (ADCIRC, FVCOM, WaveWatch3, SWAN, SCHISM, Telemac, etc.).
https://github.com/sponsors/krober10nd
GNU General Public License v3.0
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Help required in meshing above the geoid #help #meshing #218

Closed 123jk26 closed 3 years ago

123jk26 commented 3 years ago

Is it possible to mesh up to +10m contours above the geoid, for the study purpose about coastal inundation if possible, where can I give the input? I mean, in which class?

krober10nd commented 3 years ago

Hey @123jk26 I would take a look at this example https://github.com/CHLNDDEV/OceanMesh2D/blob/Projection/Examples/Example_6b_GBAY_w_floodplain.m

The boundary of the meshing domain just has to be a polygon but it can represent any geoid elevation. In order to accomplish what you're wanting to do, you would build a mesh sizing function (e.g., an edgefx) using geospatial data (contained in a geodata class) from a shoreline (e.g., 0-m or something similar). Then you'd create another geodata class with your +10 m contour for example and this would be the meshing boundary you'd pass to meshgen.

In this way, the meshing domain would extend up to +10-m but the mesh sizing variations would follow the shoreline you passed.

123jk26 commented 3 years ago

I've created a mesh accordingly and ran the output Fort.14 file in adcirc. All the time I am getting the elevation error(water surface elevation crosses 20m above datum), which (according to the ADCIRC manual) is due to the unstable mesh. how can I ensure the stability of the mesh? which are the user inputs that will affect the stability of generated mesh, mainly?

krober10nd commented 3 years ago

Like your other issue, I need to see what you’re doing. So code, inputs and figures. Is this your first time running ADCIRC?

Are you familiar with numerical simulation concepts in general?