Search found 374 matches

by oliveroxtoby
Mon Jun 15, 2020 5:56 am
Forum: CfdOF / CFD
Topic: CfdOF mesh artifacts paraview
Replies: 3
Views: 183

Re: CfdOF mesh artifacts paraview

Hello all, I am new to this forum and have been reading through some of the posts to try to overcome an issue I am having. I am currently using Freecad version 0.18 and the CfdOF workbench on a Windows 10 system. Visualisation of the model and resulting analyses are through Paraview 5.4.1 by clicki...
by oliveroxtoby
Tue Jun 09, 2020 7:40 pm
Forum: CfdOF / CFD
Topic: HiSa Boundary Conditions
Replies: 11
Views: 463

Re: HiSa Boundary Conditions

thschrader wrote:
Tue Jun 09, 2020 4:12 pm
Hisa nacaAirFoil testcase rebuilt with Freecad.
How to set the upper/lower boundaries to eliminate the reflection?
rebuilt.JPG
Setting boundary type 'Open', sub-type 'Far-field' should do it.
by oliveroxtoby
Sun Jun 07, 2020 1:35 pm
Forum: CfdOF / CFD
Topic: HiSa Boundary Conditions
Replies: 11
Views: 463

Re: HiSa Boundary Conditions

So my question is how to use HiSa together with FreeCAD? Should I avoid certain BCs? Should I edit files? Sebastiaan If the Mach number is below 1 at the boundaries, any of the available boundary conditions should work. Otherwise, only the fixed velocity and fixed pressure inlet or ourlet is design...
by oliveroxtoby
Sun Jun 07, 2020 1:31 pm
Forum: CfdOF / CFD
Topic: HiSa Boundary Conditions
Replies: 11
Views: 463

Re: HiSa Boundary Conditions

Hi ssiemons, probably the basic question is whether HiSA is a suitable solver for internal compressible flow (piping, reactors, etc). I observe that all the examples provided by the developers are about flows that are external to bodies such as air foils. Hopefully the developers can give a clue. O...
by oliveroxtoby
Sun Jun 07, 2020 1:25 pm
Forum: CfdOF / CFD
Topic: Incompressible fluid and air
Replies: 5
Views: 176

Re: Incompressible fluid and air

Hello, in physicsmodel you can not choose Compressible flows because they are not supported yet, but in fluid properties you can still choose air? I don't really understand that ... Wouldn't that be a contradiction? Air can accurately be treated as incompressible for Mach numbers below about 0.3. F...
by oliveroxtoby
Wed May 27, 2020 9:15 am
Forum: CfdOF / CFD
Topic: FreeCAD OpenFOAM unable to create mesh
Replies: 5
Views: 286

Re: FreeCAD OpenFOAM unable to create mesh

Thanks for your fast response! I feel so silly. It turns out, you get this error when you try to "Run Mesher", without creating a Mesh case first. I had some cfMesh installation issues after my first attempt, so I reinstalled cfMesh. When I ran the Mesher again, I encountered the error. In short, i...
by oliveroxtoby
Wed May 27, 2020 9:10 am
Forum: CfdOF / CFD
Topic: User experience - Default constraints
Replies: 6
Views: 347

Re: User experience - Default constraints

It was only accidentally that we discovered that the current implementation of "object U" in the 0 folder at solver start by default sets the boundary conditions for unspecified faces at "slip" (so, by default this applies to the non-inlets, not-outlets or otherwise purposely constrained faces). Ac...
by oliveroxtoby
Wed May 27, 2020 9:03 am
Forum: CfdOF / CFD
Topic: Fail to install HISA
Replies: 4
Views: 253

Re: Fail to install HISA

Roland wrote:
Tue May 26, 2020 8:15 pm

Suggestion: Might it be possible that blueCFD-Core is not yet ready for hisa 1.1.3? Or is it another issue (installation error, FreeCAD bug ...?)?

Any suggestions welcome!

Greetz,

Roland
This should be resolved - please re-install hisa.
by oliveroxtoby
Sun May 24, 2020 6:58 am
Forum: CfdOF / CFD
Topic: Meshing problem on Linux 20.04 LTS
Replies: 3
Views: 248

Re: Meshing problem on Linux 20.04 LTS

Lastly, I had so trouble using the command: sudo dnf install netgen and ended up downloading netgen (6.2.1804+dfsg1-3build2) manually from the following link: https://www.ubuntuupdates.org/package/core/focal/universe/base/netgen Sorry - this was a typo. It should have been 'apt', not 'dnf' (getting...
by oliveroxtoby
Sat May 23, 2020 4:12 pm
Forum: CfdOF / CFD
Topic: Install CFDOF on Ubuntu
Replies: 1
Views: 186

Re: Install CFDOF on Ubuntu

OS: Linux Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.18.16093 (Git) Build type: Unknown Branch: master Hash: 690774c0effe4fd7b8d2b5e2fb2b8c8d145e21ce Python version: 2.7.12 Qt version: 4.8.7 Coin version: 4.0.0a OCC version: 7.0.0 Locale: English/UnitedStates (en_US) Hi, I have...