Hi The distance pseudo dt has nothing to do with the turbulence model. It has only to do with the solution of distance. You can solve distance from boundary either using geometric information or reformulating the distance computation as a partial differential (PDE) equation. This PDE is not easily s...

Hi If having convergence issues set "Nonlinear System Relaxation Factor = 0.5" or so. If you need more than 30 nonlinear iterations you are hardly going to find a solution. Often this is because there is no solution. The transition to unsteady solution happens around Re=100 and thereafter ...

Hi Yes, you describe our position quite well. We have limited resources but some freedom to use them. So the strategy is quite a bit affected on what's going on in my head. There is no organizational policy that would affect the fine grained decisions. I acknowledge that Elmer will never have geomet...

Btw, here is a link to the webinar series if you're interested. It is free and there are ~297 open slots still ;-) Feel free to advertise. https://ssl.eventilla.com/event/ng1zO?_ga=2.170824486.741080014.1616406279-388765827.1615983410 Tomorrow (thursday) I'll talk about parallel computing with Elmer...

Hi Look at presentation from an ongoing Elmer Webinar series, ~page 11 https://www.nic.funet.fi/pub/sci/physics/elmer/webinar/02/ You see there are many undocumented models. Most importantly all five turbulence models are lacking one. They have been in principle verified but they are not terribly ro...

Hi I would guess that you're not trying to model in detail the flow of water but focus on the conductive/radiatative heat transfer + complicated heat sources. Should be no problem per se. The main question may be how do you bring the incoming energy distribution. Do you have a analytical function, o...

Hi, Elmer reads in just numbers so it assumes the user knows what she is doing. Usually we use SI units. Quite often this means that the meshes that come from CAD and are in mm are being scaled. For that we have a keyword in simulation section Coordinate Scaling = 0.001 Now that makes life easier in...

Hi You have done a great work with the tutorial! You were wondering what the Elmer team had in mind with this. Well, I made my thesis long ago about sublimation growth of silicon carbide crystals (like in the blue led of PS4). This was basically a simple furnace. When I later moved from my own code ...

I am trying to see if i can do some coding for tie constraint of multiple meshes by myself. I am still reading the documentation of FreeCAD Python, but a little help will be greatly appreciated. To be able to tie displacements without loss of accuracy you should look at "mortar methods". ...

There was discussion about ILU0 vs. ILU4. Generally ILUn is incomplete LU-decomposion that has the structure of A^n. When n gets larger the LU-decomposition approaches the complete solution eliminating the very reason why iterative methods were used in the 1st place. Also the filling order of A^n gr...