Thank you very much Bernd. I just started working with CFD and your videos are great help. Thank you for your efforts to bring some light into setting up project development procedures in this very complex field
Hi sstevenson! No, I am not the author of the CfdOf workbench. The lead developers of this version were Johan Heyns, Oliver Oxtoby and Alfred Bogaers, and there have been several pre-versions, for example the version by Qingfeng Xia. You can find the contributors here: gitlab.com/opensimproject/cfdof
@@techbernd5535 Hello Bernd, I am trying to duplicate your demo with the latest version of cfdOF and OpenFOAM 2206. The new version of cfdOF does not offer a 2DBoundary constraint option for the front and back walls as shown in your video. It only offers Symmetric or Periodic options. I chose Symmetric and my simulation seems to be running as 3D and is taking a long time. Do you know how to make this 2D in the latest version?
Hello tanushkareddy, the way to mesh a 2d surface has changed one year ago: The 2D meshing is now defined as a "mesh refinement" (=> extrusion). For further information, you can take a look in the Freecad-Forum: forum.freecadweb.org/viewtopic.php?f=37&t=66741
Hi @poulmack, thank you very much for this interesting question. I had already answered a similar question, but the answer has disappeared. I spend a lot of effort answering questions, so I will no longer answer these questions via RUclips in the future. The risk of my answers disappearing is too great for me. Therefore, I would like to ask you to ask your question in the FreeCad forum, subsection CfdOf. Other experts, such as oliveroxtoby and thschrader, also have the opportunity to respond there. The address is: forum.freecad.org/viewforum.php?f=37
As I wrote earlier, the FreeCad forum is better suited for these types of questions. Could you please ask your question there? The link to the FreeCad-Forum, subforum CfdOf, is: forum.freecad.org/viewforum.php?f=37 The expression "Overset mesh simulation" is unknown to me. Could you further detail your question in your post in the FreeCad forum? Which solver does your question refer to? Does your question only apply to InterFoam and mixed fluids, or to all solvers? What application do you want to use this technique for?
@@techbernd5535 Sure I will elaborate my question and post on the foruns during my lunch break, I am not sure, but I believe that it doesn't apply to InterFoam, if I am not mistaken there are a few special set of solvers, the one I have in mind if overDynInterSolver or something like this. The overset mesh is typically used to combine mesh elements. The best example I think is a rotating propeller, because you have the background mesh, that is, the control volume, and you have the propeller mesh, that rotates, pushing the fluid. In my case, I am trying to do a mooring analysis of a safety buoy net. I will apply the fluid velocity on the inlet, try to implement the mooring library to apply the BCs on the floating bodies and see how they behave. I need to prevent the buoy assembly of going underwater under heavy flow when the hydroeletric plant opens its flooding gates.
Wie kann das sein dass 3s Simulationszeit bei dir in 15min fertig waren mit 4 Kernen. Ich hab das genauso nachgebaut und habe 12c/24t @4,8GHz und bin nach 15min erst bei 0,04s. Stimmt da was nicht mit meinem Rechner bzw Einstellungen?
Tut mir leid, dazu kann ich Dir keine Antwort geben. Es hängt vermutlich mit der Konfiguration Deines Rechners und vor allem mit der Parallelisierung zusammen. Diese Frage ist besser im FreeCad-Forum aufgehoben, hier können Experten, die sich deutlich besser mit der Konfiguration auskennen, Deine Frage beantworten. Im FreeCad-Forum findest Du auch meine Eingabedatei. Den Unterabschnitt CFD im FreeCad-Form findest Du hier: forum.freecad.org/viewforum.php?f=37
Thank you very much Bernd. I just started working with CFD and your videos are great help. Thank you for your efforts to bring some light into setting up project development procedures in this very complex field
Love these videos! Is it possible to simulate a constant water source such as a waterfall?
Hello Mr.D, I wrote the answer to your question in the FreeCad forum. Here is the link to my answer: forum.freecad.org/viewtopic.php?t=78927#p687060
Great video, thank you so much! These are a tremendous help in learning the process of using cfdof. Are you one of the authors this workbench?
Hi sstevenson! No, I am not the author of the CfdOf workbench. The lead developers of this version were Johan Heyns,
Oliver Oxtoby and Alfred Bogaers, and there have been several pre-versions, for example the version by Qingfeng Xia. You can find the contributors here: gitlab.com/opensimproject/cfdof
@@techbernd5535 Hello Bernd, I am trying to duplicate your demo with the latest version of cfdOF and OpenFOAM 2206. The new version of cfdOF does not offer a 2DBoundary constraint option for the front and back walls as shown in your video. It only offers Symmetric or Periodic options. I chose Symmetric and my simulation seems to be running as 3D and is taking a long time. Do you know how to make this 2D in the latest version?
For the Sub-type, FreeCAD0.21.2 does not have the 2D bounding plane. There is only "Symmetric" and "Periodic". Which of the two should I choose?
Hello tanushkareddy, the way to mesh a 2d surface has changed one year ago: The 2D meshing is now defined as a "mesh refinement" (=> extrusion). For further information, you can take a look in the Freecad-Forum: forum.freecadweb.org/viewtopic.php?f=37&t=66741
Great video,
Is it possible to simulate water and sand particles in a similar way?
Hi @poulmack, thank you very much for this interesting question.
I had already answered a similar question, but the answer has disappeared. I spend a lot of effort answering questions, so I will no longer answer these questions via RUclips in the future. The risk of my answers disappearing is too great for me. Therefore, I would like to ask you to ask your question in the FreeCad forum, subsection CfdOf. Other experts, such as oliveroxtoby and thschrader, also have the opportunity to respond there. The address is: forum.freecad.org/viewforum.php?f=37
is it possible to use CfdOF to make overset mesh simulation?
As I wrote earlier, the FreeCad forum is better suited for these types of questions. Could you please ask your question there? The link to the FreeCad-Forum, subforum CfdOf, is: forum.freecad.org/viewforum.php?f=37
The expression "Overset mesh simulation" is unknown to me. Could you further detail your question in your post in the FreeCad forum? Which solver does your question refer to? Does your question only apply to InterFoam and mixed fluids, or to all solvers? What application do you want to use this technique for?
@@techbernd5535 Sure I will elaborate my question and post on the foruns during my lunch break, I am not sure, but I believe that it doesn't apply to InterFoam, if I am not mistaken there are a few special set of solvers, the one I have in mind if overDynInterSolver or something like this.
The overset mesh is typically used to combine mesh elements. The best example I think is a rotating propeller, because you have the background mesh, that is, the control volume, and you have the propeller mesh, that rotates, pushing the fluid.
In my case, I am trying to do a mooring analysis of a safety buoy net. I will apply the fluid velocity on the inlet, try to implement the mooring library to apply the BCs on the floating bodies and see how they behave. I need to prevent the buoy assembly of going underwater under heavy flow when the hydroeletric plant opens its flooding gates.
Wie kann das sein dass 3s Simulationszeit bei dir in 15min fertig waren mit 4 Kernen.
Ich hab das genauso nachgebaut und habe 12c/24t @4,8GHz und bin nach 15min erst bei 0,04s.
Stimmt da was nicht mit meinem Rechner bzw Einstellungen?
Tut mir leid, dazu kann ich Dir keine Antwort geben. Es hängt vermutlich mit der Konfiguration Deines Rechners und vor allem mit der Parallelisierung zusammen. Diese Frage ist besser im FreeCad-Forum aufgehoben, hier können Experten, die sich deutlich besser mit der Konfiguration auskennen, Deine Frage beantworten. Im FreeCad-Forum findest Du auch meine Eingabedatei. Den Unterabschnitt CFD im FreeCad-Form findest Du hier: forum.freecad.org/viewforum.php?f=37