Search found 208 matches

by mark smith
12 Aug 2019, 17:41
Forum: Bug reports
Topic: elmersolver_mpi crashes on exit
Replies: 0
Views: 1064

elmersolver_mpi crashes on exit

Hi All I'm running Elmer Version: 8.3 (Rev: cd07b731, Compiled: 2018-10-10) on a windows 7 pro 64 bit machine and get the following problem when the calculation finishes. Problem signature: Problem Event Name: APPCRASH Application Name: elmersolver_mpi.exe Application Version: 0.0.0.0 Application Ti...
by mark smith
03 Apr 2019, 18:29
Forum: ElmerSolver
Topic: Conjugate heat transfer problem
Replies: 6
Views: 683

Re: Conjugate heat transfer problem

Hi Peter, you asked Q: "Are you sure that your heat is not convected away at the outlet"? Indeed it is, in the model the heat cannot leave by any other means. The problem is that the warm fluid leaving the system has more energy than that supplied via the heat flux BC, by 20% more in my linear tet m...
by mark smith
03 Apr 2019, 15:55
Forum: ElmerSolver
Topic: Conjugate heat transfer problem
Replies: 6
Views: 683

Re: Conjugate heat transfer problem

Hi, Just a quick update. I have run an all linear tet mesh problem, GMSH mesh file size 170Mb (650000 fluid tets 2330000 solid tets), this runs to completion on 8 processors in 20 mins. The mesh is converted to 2nd order 10 node tets in GMSH (incomplete elements) producing a GMSH file of size 565Mb,...
by mark smith
01 Apr 2019, 20:50
Forum: ElmerSolver
Topic: Conjugate heat transfer problem
Replies: 6
Views: 683

Conjugate heat transfer problem

Hi, I'm doing a coupled heat fluid flow simulation with a fluid channel flowing through a solid with a heat load on it's surface (liquid cooled heat-sink), the only path for the heat is into the fluid. My solution conserves fluid flow, the heat flux into the surface agrees with my Heat Flux boundary...
by mark smith
20 Mar 2019, 02:09
Forum: ElmerSolver
Topic: Result Output error
Replies: 2
Views: 363

Re: Result Output error

Hi Peter, I have parametric geometry from gmsh and have the option of putting a heat load on the surface or not so rather than having to edit the geometry and sif file bc's it was easier to put a zero heat flux on the boundary so I could still see the temperature distribution on the surface in parav...
by mark smith
15 Mar 2019, 04:09
Forum: ElmerSolver
Topic: Result Output error
Replies: 2
Views: 363

Result Output error

Hi Elmer team, Elmer Version: 8.3 (Rev: cd07b731, Compiled: 2018-10-10) I'm doing fluid flow+thermal simulation and have noticed a problem with the vtu output with certain boundary conditions e.g. see below Boundary Condition 6 Target Boundaries(1) = 5 Name = "heat exchanger top surface outer" !! He...
by mark smith
08 Mar 2019, 05:30
Forum: ElmerSolver
Topic: Using restart file at higher mesh level
Replies: 5
Views: 656

Re: Using restart file at higher mesh level

Hi Peter,
Worked perfectly, thanks ;-)
Regards
Mark
by mark smith
08 Mar 2019, 01:31
Forum: ElmerSolver
Topic: Using restart file at higher mesh level
Replies: 5
Views: 656

Re: Using restart file at higher mesh level

Hi Peter,
Thanks for the quick reply, i'll try later & report back.
Best regards
Mark
by mark smith
07 Mar 2019, 18:56
Forum: ElmerSolver
Topic: Using restart file at higher mesh level
Replies: 5
Views: 656

Re: Using restart file at higher mesh level

Hi Peter, Thanks for the reply. I did a simulation at Mesh levels=2, and saved the results so I could do a restart with different solid material but when I try a restart at Mesh levels=2, the simulation doesn't run see attached log file, the vtu results files from the first run show the results on t...
by mark smith
06 Mar 2019, 20:07
Forum: ElmerSolver
Topic: Using restart file at higher mesh level
Replies: 5
Views: 656

Using restart file at higher mesh level

Hi All, I have done a thermal+fluid simulation at "Mesh Levels = 1" and wondered if there is any way of interpolating the results from the "Output File = results.dat" as a restart file when I increase the mesh refinement to "Mesh Levels = 2" as trying it in a straight forward way doesn't work ;-( TI...