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by Christoph
Wed Nov 15, 2017 7:28 pm
Forum: FEM
Topic: Different mesh in FC and ElmerGUI
Replies: 8
Views: 697

Re: Different mesh in FC and ElmerGUI

In Elmer GUI go to: View -> Shade Model -> Smooth And all is fine. mhhh, does not work using Elmer 8.3 on Windows 10. I can not see any change using this command. I am playing around with following software packages: - FreeCAD - Salome Meca - Elmer - LibreCAD (no simulation, but quite a nice softwa...
by Christoph
Tue Nov 14, 2017 10:19 pm
Forum: FEM
Topic: Different mesh in FC and ElmerGUI
Replies: 8
Views: 697

Re: Different mesh in FC and ElmerGUI

I would guess Elmergui is just not able to visualize second order meshes correctly respectively middle nodes located on curved geometries. If showing node numbers in Elmergui, every edge has a middle node. So everything is fine. Remeshing the mesh in FreeCAD as 1st order, the mesh looks a bit like t...
by Christoph
Sun Nov 12, 2017 9:01 pm
Forum: Forum in Deutsch
Topic: FEM Berechnung, zwei mit einander verbundene Bauteile
Replies: 66
Views: 4407

Re: FEM Berechnung, zwei mit einander verbundene Bauteile

Die Wärmeübergänge kann man auch mit der Nutzeroberfläche definieren mittels "Create a FEM Constraint for a heat flux acting on a face". Nach DIN 6946 Wärmetechnische Berechnungen im Hochbau wird außen ein Wärmeübergangswiderstand von Rse = 0,4 m²K/W (alpha = 25) und innen ein Widerstand von Rsi = 0...
by Christoph
Thu Sep 28, 2017 8:48 pm
Forum: Forum in Deutsch
Topic: {gelöst] bildschirmaufnahmen
Replies: 7
Views: 476

Re: bildschirmaufnahmen

Unter Ubuntu mit SimpleScreenRecorder rauscht mein Mikrofon leider extrem, bin bisher daran gescheitert das abzustellen. Ich kenne das Problem. Seit ich ein USB-Headset nutze ist alles o.k.. Im Büro nutze ich ein Headset mit Klinkensteckern, habe aber eine USB-Soundkarte dazwischen. Die kleinen Din...
by Christoph
Mon Sep 25, 2017 10:19 pm
Forum: FEM
Topic: Help to debug "Error on: FemConstraintForce"
Replies: 39
Views: 2332

Re: Help to debug "Error on: FemConstraintForce"

yes, just use Gmsh, its the icon right beside of the netgen mesh button. Some thought about the analysis: the tubes are pretty thin with 1 mm, maybe it is better to use shell elements because such thin geometries to mesh with volume elements is painfull. I was not able to create volume elements with...
by Christoph
Mon Sep 25, 2017 9:35 pm
Forum: FEM
Topic: Help to debug "Error on: FemConstraintForce"
Replies: 39
Views: 2332

Re: Help to debug "Error on: FemConstraintForce"

please dont use 0.16 version regarding fem workbench. 0.17 version of freecad has a much more powerfull fem workbench with lots of fixes and improvements. You can use daily builds with ubuntu: https://launchpad.net/~freecad-maintainers/+archive/ubuntu/freecad-daily Maybe that will already solve this...
by Christoph
Mon Sep 25, 2017 6:13 pm
Forum: Forum in Deutsch
Topic: {gelöst] bildschirmaufnahmen
Replies: 7
Views: 476

Re: bildschirmaufnahmen

unter Windows läuft Open Broadcaster Software sehr gut um Screencasts zu erstellen und kam bei mir ohne Zusatzprogramme. Zeigt aber leider nicht Tastaturaktivitäten bzw. rechts / links Klicks. Es zeichnet auch den Ton problemlos mit auf. Unter Ubuntu mit SimpleScreenRecorder rauscht mein Mikrofon le...
by Christoph
Sun Sep 24, 2017 8:19 pm
Forum: Help on using FreeCAD
Topic: FEM: How to create model with multiple materials
Replies: 14
Views: 2252

Re: FEM: How to create model with multiple materials

Hi Harald, FreeCAD Fem Workbencb can calculate temperature distributions using thermo mechanic, i.e. it should be possible to display the temperature distribution in building envelopes (thermal bridges as concrete floores, corners etc.). But its not possible to display heat flux density or calculate...
by Christoph
Sat Sep 23, 2017 9:02 pm
Forum: Help on using FreeCAD
Topic: FEM: How to create model with multiple materials
Replies: 14
Views: 2252

Re: FEM: How to create model with multiple materials

can you upload the model with the analysis which won't run? To reduce the size of the file, clear FEM mesh (right click on the mesh)

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