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Warning: Undefined array key "media" in /home/np29546/public_html/elmerice/wiki/feed.php on line 397 Elmer/Ice Wiki tips
https://elmerfem.org/elmerice/wiki/
2024-04-27T05:27:20+00:00Elmer/Ice Wiki
https://elmerfem.org/elmerice/wiki/
https://elmerfem.org/elmerice/wiki/lib/tpl/arctic/images/favicon.icotext/html2013-05-07T16:46:33+00:00Anonymous (anonymous@undisclosed.example.com)tips:boundary
https://elmerfem.org/elmerice/wiki/doku.php?id=tips:boundary&rev=1367945193&do=diff
Boundary Condition Examples
Some examples of typical boundary conditions.
Marine boundary
!! water pressure at glacier front
$ function waterpressure(Z) {\
rhow = 1025.0;\
waterline = 0.0;\
G = 9.81;\
_waterpressure = 0.0;\
if (Z>waterline) {\
_waterpressure = 0.0;\
}else {\
_waterpressure = 1.0 * rhow * G * (waterline - Z);\
}\
}
Boundary Condition 4
Name = "sides"
....
External Pressure = Variable Coordinate 3 !we are in MPa units
Real MATC "-1.0*wat…text/html2018-05-16T07:02:04+00:00Anonymous (anonymous@undisclosed.example.com)tips:editors
https://elmerfem.org/elmerice/wiki/doku.php?id=tips:editors&rev=1526454124&do=diff
Highlighting for Emacs
Thanks to Carlos Martin and Basile de Fleurian we can offer additional settings for Emacs (a GNU licenses text editor) for automatic highlighting of Solver Input File Syntax (SIF). Just add the following lines to your .emacs file (should reside in your home-directory):text/html2013-05-06T15:27:59+00:00Anonymous (anonymous@undisclosed.example.com)tips:firnheating
https://elmerfem.org/elmerice/wiki/doku.php?id=tips:firnheating&rev=1367854079&do=diff
Firn heating
Firn heating (latent heat through refreezing of percolating meltwater) following
Wright, A. P., J. L. Wadham, M. J. Siegert, A. Luckman, J. Kohler, and A. M. Nuttall (2007), Modeling the refreezing of meltwater as superimposed ice on a high Arctic glacier: A comparison of approaches, J. Geophys. Res., 112, F04016, doi:10.1029/2007JF000818text/html2013-11-07T17:16:46+00:00Anonymous (anonymous@undisclosed.example.com)tips:freesurface
https://elmerfem.org/elmerice/wiki/doku.php?id=tips:freesurface&rev=1383844606&do=diff
Implementation of a prognostic free surface problem
In prognostic free surface problems, the kinematic boundary condition for the free surface is a partial differential equation (PDE) and hence has to be solved. The domain of the solution, though, is atext/html2012-11-20T21:58:53+00:00Anonymous (anonymous@undisclosed.example.com)tips:longlat
https://elmerfem.org/elmerice/wiki/doku.php?id=tips:longlat&rev=1353448733&do=diff
Longitude / Latitude
How to defined the Longitude/Latitude as a function of stereographic projected Cartesian coordinates?
This is an example that is being used for Dome F region, EAIS, with input coordinated from the projection on -71 degrees latitude (with R=6371 km):text/html2012-11-19T08:19:09+00:00Anonymous (anonymous@undisclosed.example.com)tips:matc
https://elmerfem.org/elmerice/wiki/doku.php?id=tips:matc&rev=1353313149&do=diff
MATC Examples
Here some hints on how to deploy Elmer's internal scripting language MATC are shown. For a deeper introduction to MATC, see the MATC manual.
General structure of a MATC function
A MATC function can be used if there is the need for a more complex syntax (like if-cases) that would render an in-line MATC directive too complicated. Functions are declared outside any section in the SIF with the general syntax:text/html2013-01-30T06:23:40+00:00Anonymous (anonymous@undisclosed.example.com)tips:normalvelo
https://elmerfem.org/elmerice/wiki/doku.php?id=tips:normalvelo&rev=1359527020&do=diff
Normal Velocity at a boundary
Sometimes it is important to inquire, where on a surface the flow goes into and where out of the surface. This demands an existing solution of the normal vector, which is to be found under ComputeNormal, and of course the velocity field. The inner product of these vectors is then the normal velocity. As the surface normal by convention should point outwards, positive signs of the normal velocity correspond to outflow, negative to inflow.text/html2013-06-27T15:57:50+00:00Anonymous (anonymous@undisclosed.example.com)tips:post
https://elmerfem.org/elmerice/wiki/doku.php?id=tips:post&rev=1372348670&do=diff
Post-treatments
This page present some information regarding the post-treatment of results.
ElmerPost
ElmerPost is the build-in post-processing tools of Elmer. ElmerPost reads result in Elmer Post type file (.ep).
Mesh deformation
For transient simulation, ElmerPost doesn't upgrade directly the mesh using the variabletext/html2013-10-04T08:03:42+00:00Anonymous (anonymous@undisclosed.example.com)tips:sidebar
https://elmerfem.org/elmerice/wiki/doku.php?id=tips:sidebar&rev=1380873822&do=diff
* Tips and Tricks
* Longitude/Latitude
* MATC examples
* Normal Velocity
* Prognostic Free Surface
* Post-Treatments
* Thermodynamic Properties
* Boundary Conditions
* Firn heating
* Highlighting in Emacs and vitext/html2018-10-27T20:03:16+00:00Anonymous (anonymous@undisclosed.example.com)tips:thermoprop
https://elmerfem.org/elmerice/wiki/doku.php?id=tips:thermoprop&rev=1540670596&do=diff
Thermodynamic Properties
On this page one can find MATC based SIF inputs for thermodynamic properties. The following properties are given below:
* Heat Capacity of ice as a function of temperature
* Heat Conductivity of ice as a function of temperature