Elmer Discussion Forum

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...

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...

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&q...

Hi Peter,
Worked perfectly, thanks
Regards
Mark

Hi Peter,
Thanks for the quick reply, i'll try later & report back.
Best regards
Mark

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...

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 f...

hi Rainer, I find gmsh the way to go, it can import solid geometry from CAD or you can draw directly in gmsh. After meshing you save the file in native gmsh format, make sure you select version 2.0 , then using elmergrid convert this gmsh mesh into elmer format. e.g. for serial processing elmergrid ...

Hi Elmer team, I'm doing a laminar flow NS simulation using a mesh created in Gmsh. The mesh is 100% prisms, if I use linear 6 noded elements the simulation runs perfectly but if I change the mesh order to second order 15noded elements (715) the simulation terminates early see attached log (same mes...

Hi Peter, Thanks for the quick reply, I went onto the Gmsh -- Public mailing list for Gmsh users and got the answer of how to suppress the unwanted nodes so as to only get the 15 node element,this is done by setting in Gmsh's Current options and Workspace with the following: Mesh.SecondOrderIncomple...