Search found 99 matches

by tzwinger
04 Jan 2016, 09:43
Forum: Elmer/Ice
Topic: Help to apply shear force at boundary
Replies: 4
Views: 8847

Re: Help to apply shear force at boundary

Hi Liz, tangential forces can be applied with the keywords Pressure {1,2,3} for directional applied surface stresses (force/unit-area) or External Pressure for normal external pressure (I know, the naming is unfortunate, but this is something from old Elmer history). In your particular case I'd spli...
by tzwinger
17 Nov 2015, 11:28
Forum: Elmer/Ice
Topic: can elmerice compute ice velocity
Replies: 2
Views: 6716

Re: can elmerice compute ice velocity

Dear Saisai, First of all, we have no clue what the units in the picture from Rignot are (cm/day, m/year?) we should compare your results to - if you used the attached SIF your Elmer/Ice velocities are m/year. Looking at your SIF you have a no-slip condition at the bedrock, which kind of contradicts...
by tzwinger
24 Sep 2015, 10:46
Forum: Elmer/Ice
Topic: some units problems when I join the sliding section
Replies: 1
Views: 6093

Re: some units problems when I join the sliding section

Hello, the units (and hence the value) of the coefficient for the sliding law depends on the rest of you units. Elmer doesn't restrict you on that. If you use SI units (m-kg-seconds) then the unit for the friction coefficient (the beta^2 as decribed for instance in ISMIP-HOM experiments for linear s...
by tzwinger
07 May 2015, 08:38
Forum: Elmer/Ice
Topic: ctest failed due to segmentation fault errors
Replies: 10
Views: 19966

Re: ctest failed due to segmentation fault errors

One more hint I got yesterday from a colleague for OSX: one frequent cause of troubles could be the Blas library provided by Apple. If I understood correctly, there might be a way to replace it by one from homebrew. Dunno if this helps

Thomas
by tzwinger
07 May 2015, 08:34
Forum: Elmer/Ice
Topic: ctest failed due to segmentation fault errors
Replies: 10
Views: 19966

Re: ctest failed due to segmentation fault errors

Hi Michelle, we are working on a documented plan how to install on OSX. For your CentOS installation: you definitely want to have MUMPS and easily can forget about Hypre if you are doing glaciological problems. On RHEL I found a RPM package for MUMPS in the EPEL repository and this looks very promis...
by tzwinger
05 May 2015, 13:29
Forum: Elmer/Ice
Topic: ctest failed due to segmentation fault errors
Replies: 10
Views: 19966

Re: ctest failed due to segmentation fault errors

Michelle, the ctest is meant for testing _before_ installation, hence falls back on the binaries inside your build-tree. Hence, all paths there are more or less hard-coded. If you change something after compiling (renaming, copying), this might cause problems. Else, I am lacking any explanation for ...
by tzwinger
01 May 2015, 09:10
Forum: Elmer/Ice
Topic: ctest failed due to segmentation fault errors
Replies: 10
Views: 19966

Re: ctest failed due to segmentation fault errors

Hello, checking your logs, it seems to me that the ctests want to access directories that a) either do not exist b) are not set for permission CMake Error at /Users/johnchristian/Elmer/elmerice/elmerice/Tests/test_macros.cmake:70 (FILE): file failed to open for reading (No such file or directory): /...
by tzwinger
30 Apr 2015, 09:01
Forum: Elmer/Ice
Topic: ParStokes and ice shelves
Replies: 3
Views: 6946

Re: ParStokes and ice shelves

Dear Martin, if your "normal" Stokes solver produced a solution, then - in principle - the ParStokes should do so, too. Could you please indicate which part of ParStokes refuses to converge: the outer (GCR) system or one of the block-preconditioning sub-problems? Do you have grounding-line...
by tzwinger
30 Apr 2015, 07:53
Forum: Elmer/Ice
Topic: ctest failed due to segmentation fault errors
Replies: 10
Views: 19966

Re: ctest failed due to segmentation fault errors

Hi Michelle, this is a little bit tricky to analyze remotely, not only (but mainly) because of OSX. I think a good start would be, if you could send the log of the seg-faulted test (should be under Testing/Temporary in your build-directory) and perhaps give us hints how you configured your environme...
by tzwinger
23 Mar 2015, 09:45
Forum: Elmer/Ice
Topic: Elmer-2Dglaciertoymodel
Replies: 1
Views: 6138

Re: Elmer-2Dglaciertoymodel

Dear Kevin, the "side" boundaries in the test example for the Reykjavik course simply set the horizontal velocity component (what ever direction this is in your model, in ours it is X or direction #1) to zero while leaving the vertical (in our model Y or #2) without a Dirichlet condition, ...