Search found 106 matches

by julieng
Sat Dec 19, 2020 7:55 am
Forum: CfdOF / CFD
Topic: Can’t parallel the solver
Replies: 13
Views: 6282

Re: Can’t parallel the solver

Hello, I have the problem when running in parallel cfdOF with bluecfdcore. ERROR: Failed to post close command error 1726 ERROR: unable to tear down the job tree. exiting... I see that the solution is to uninstall/ reinstall bluefcd core but I am afraid to loose my set up with swak4Foam for example ...
by julieng
Fri Dec 18, 2020 8:09 pm
Forum: CfdOF / CFD
Topic: Chip cooling ==> new solver available
Replies: 30
Views: 16941

Re: Chip cooling ==> new solver available

Hello, The case is attached without the polyMesh folder (too big). The Mesh has been generated with Salome 9.5. The residual control < 10^(-6) for h. It converges in 1800 iterations https://zupimages.net/up/20/51/f3id.jpg In the controlDict file, the postreatment for wall power takes into account th...
by julieng
Wed Dec 16, 2020 11:02 pm
Forum: CfdOF / CFD
Topic: Chip cooling ==> new solver available
Replies: 30
Views: 16941

Re: Chip cooling ==> new solver available

Hello, Let me share my results on buoyantSimpleFoam solver. First I have mesh with Salome a 3 parts duct, 1000 mm with adiabatic wall for the mixing of the fluid, 2000 mm for the heat exchange zone (heat transfer coef) and 1000 mm more of adiabatic wall for outlet (I read this tip on cfdonline forum...
by julieng
Sun Dec 06, 2020 8:06 am
Forum: Forum français
Topic: linear pattern mirror etc
Replies: 16
Views: 1305

Re: linear pattern mirror etc

Bonjour,

On dirait que le multibody va arriver finalement

https://forum.freecadweb.org/viewtopic.php?f=19&t=52221

On verra.

Bon dimanche
by julieng
Sun Nov 29, 2020 8:40 pm
Forum: CfdOF / CFD
Topic: Chip cooling ==> new solver available
Replies: 30
Views: 16941

Re: Chip cooling ==> new solver available

To begin to confirm the simulation.
I have done an excel sheet with Colburn assumption in order to calculate the Nusselts number.
I obtain with the case parameters for temp outlet 443 K which is pretty close to the commercial software value.
by julieng
Sun Nov 29, 2020 8:03 pm
Forum: CfdOF / CFD
Topic: Chip cooling ==> new solver available
Replies: 30
Views: 16941

Re: Chip cooling ==> new solver available

Thank you thschrader for your answer, y+ value is dependant of what you want to calculate with your simulation. For drag and lift force (as describe in the video that you advise to me) the y+ value needs to be less than 5. It is also the case for energy exchange near walls. The tutorial that you wan...
by julieng
Sun Nov 29, 2020 4:43 pm
Forum: CfdOF / CFD
Topic: Chip cooling ==> new solver available
Replies: 30
Views: 16941

Re: Chip cooling ==> new solver available

Hello, Now it is ok for the convergence, thank you. The solver converges < 0.0001 I check y + for buoyantsimplefoam on the webb and it is very tricky. https://www.cfd-online.com/Forums/openfoam-solving/201559-buoyantsimplefoam-energy-balance-error.html I try to record the average temperatures from o...
by julieng
Sun Nov 29, 2020 8:28 am
Forum: Forum français
Topic: linear pattern mirror etc
Replies: 16
Views: 1305

Re: linear pattern mirror etc

Bonjour, Je m'en suis sorti avec draft + une Feuille de paramètres. Renseigner le point de rotation avec les données de la feuille (au passage on ne peut pas sélectionner de point de rotation directement dans draft, il faut accéder aux data pour le raccorder manuellement aux coordonnées de la feuill...
by julieng
Sun Nov 29, 2020 12:12 am
Forum: FEM
Topic: FreeCAD as pre-post processor for MBDyn
Replies: 437
Views: 176488

Re: FreeCAD as pre-post processor for MBDyn

Hello, I am interested in using MBDyn with FreeCAD. I have try some years ago a similar module in Comsol. If I remember well, it has an extra cost in term of memory and time to be able to calculate the constraints in bodies with the dynamic module (elastic bodies). When computing only displacement, ...
by julieng
Sun Nov 29, 2020 12:04 am
Forum: Forum français
Topic: linear pattern mirror etc
Replies: 16
Views: 1305

Re: linear pattern mirror etc

Je suis en train de chercher pour une répétition dans l'atelier Assembly 3, on ne peut pas répéter une pièce comme dans part design ? Exemple, si j'ai une pièce avec une répétition de perçages, est il possible dans l'assemblage d'inclure une vis puis répéter cette répétition sur la vis ? Encore mieu...