A new series of 10 tutorials about Freecad CfdOf
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Re: A new series of 10 tutorials about Freecad CfdOf
Great series. I just found the playlist the other day. I'm slowly making my way through them. Thanks for sharing them.
- Raedchen_im_System
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Re: A new series of 10 tutorials about Freecad CfdOf
Tutorial #11: Simple Combustion with reactingFoam
I'm very excited to announce the latest release: I've recorded a new tutorial about reactingFoam. Methane and air react in a reactor vessel. The "conversion" of the solver from PimpleFoam to reactingFoam and the review of the results with Paraview is shown.
The hottest video I have ever recorded - temperatures above 2000 K were achieved.
The openFoam-tutorial that I used as a template for reactingFoam can be found here:
https://github.com/OpenFOAM/OpenFOAM-6
https://github.com/OpenFOAM/OpenFOAM-6/ ... lowFlame2D
Physics Model: transient, multiple phasis with chemical reactions, viscous, laminar flow
2D Model
Fluid: methane, air, water, carbon dioxide
Mesher: CfMesh
Solver Openfoam: reactingFoam
Link: https://youtu.be/TnPm4SVmdp0
I'm very excited to announce the latest release: I've recorded a new tutorial about reactingFoam. Methane and air react in a reactor vessel. The "conversion" of the solver from PimpleFoam to reactingFoam and the review of the results with Paraview is shown.
The hottest video I have ever recorded - temperatures above 2000 K were achieved.
The openFoam-tutorial that I used as a template for reactingFoam can be found here:
https://github.com/OpenFOAM/OpenFOAM-6
https://github.com/OpenFOAM/OpenFOAM-6/ ... lowFlame2D
Physics Model: transient, multiple phasis with chemical reactions, viscous, laminar flow
2D Model
Fluid: methane, air, water, carbon dioxide
Mesher: CfMesh
Solver Openfoam: reactingFoam
Link: https://youtu.be/TnPm4SVmdp0
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Re: A new series of 10 tutorials about Freecad CfdOf
Great ideaRaedchen_im_System wrote: ↑Sat Mar 04, 2023 11:11 pm ...
The hottest video I have ever recorded...
...
Re: A new series of 10 tutorials about Freecad CfdOf
The super YouTube CFD videos bring me to this forum.
Well done.
Well done.
Roland Kärnten
- Raedchen_im_System
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Re: A new series of 10 tutorials about Freecad CfdOf
Tutorial #12: Simple Combustion with reactingFoam
In addition to my tutorial #11, I have recorded the next tutorial about explosive combustion using reactingFoam.
The openFoam-tutorial that I used as a template for reactingFoam can be found here:
https://github.com/OpenFOAM/OpenFOAM-6
https://github.com/OpenFOAM/OpenFOAM-6/ ... lowFlame2D
The original goal was to set up a simulation similar to combustion in an internal combustion engine. I was only partially able to do this due to the instability of reactingFoam. Nevertheless, I have shown that this type of combustion can be simulated with reactingFoam.
Physics Model: transient, multiple phasis with chemical reactions, viscous, laminar flow
2D Model
Fluid: methane, air, water, carbon dioxide
Mesher: CfMesh
Solver Openfoam: reactingFoam
Link to the video: https://youtu.be/fvdZFCL6DHM
In addition to my tutorial #11, I have recorded the next tutorial about explosive combustion using reactingFoam.
The openFoam-tutorial that I used as a template for reactingFoam can be found here:
https://github.com/OpenFOAM/OpenFOAM-6
https://github.com/OpenFOAM/OpenFOAM-6/ ... lowFlame2D
The original goal was to set up a simulation similar to combustion in an internal combustion engine. I was only partially able to do this due to the instability of reactingFoam. Nevertheless, I have shown that this type of combustion can be simulated with reactingFoam.
Physics Model: transient, multiple phasis with chemical reactions, viscous, laminar flow
2D Model
Fluid: methane, air, water, carbon dioxide
Mesher: CfMesh
Solver Openfoam: reactingFoam
Link to the video: https://youtu.be/fvdZFCL6DHM
- Raedchen_im_System
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Re: A new series of 10 tutorials about Freecad CfdOf
Tutorial #13: Kelvin-Helmholtz instability with interFoam
I recorded a new tutorial about the Kelvin-Helmholtz instability. The resulting vortices are awesome.
For this simulation, I tried to use the dynamic refinement, but this leads to an error: For this reason I used a very high-resolution mesh with an edge length of 0.5 mm. This increases the computing time on my computer to 2 hours and 44 minutes.
I took the experimental setup from the video by "Sixty Symbols" and the University of Nottingham, it's a video well worth seeing: https://youtu.be/mf_143gkKSQ
Physics Model: transient, multiple phasis, viscous, laminar flow
2D Model
Fluid:water / Sea Water
Mesher: CfMesh
Solver Openfoam: interFoam
Link to the video: https://youtu.be/w7ZKDwps1p4
Please find the model attached.
I recorded a new tutorial about the Kelvin-Helmholtz instability. The resulting vortices are awesome.
For this simulation, I tried to use the dynamic refinement, but this leads to an error: For this reason I used a very high-resolution mesh with an edge length of 0.5 mm. This increases the computing time on my computer to 2 hours and 44 minutes.
I took the experimental setup from the video by "Sixty Symbols" and the University of Nottingham, it's a video well worth seeing: https://youtu.be/mf_143gkKSQ
Physics Model: transient, multiple phasis, viscous, laminar flow
2D Model
Fluid:water / Sea Water
Mesher: CfMesh
Solver Openfoam: interFoam
Link to the video: https://youtu.be/w7ZKDwps1p4
Please find the model attached.
- Attachments
-
- Lektion13_KelvinHelmholtzInstability.FCStd
- (15.08 KiB) Downloaded 102 times
- Raedchen_im_System
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Re: A new series of 10 tutorials about Freecad CfdOf
Tutorial #14: Simulation of Bubbles with InterFoam
In this video tutorial I tried to simulate air bubbles in water. The result is quite pleasing, but due to the fact that surface tension is not taken into account, the bubbles look different. In this tutorial, a material flow is used for the multiphase simulation with the Interfoam solver, i.e. there is an inlet and an outlet.
Physics Model: transient, multiple phasis, viscous, laminar flow
2D Model
Fluid:water / air
Mesher: CfMesh
Solver Openfoam: interFoam
Link to the video: https://youtu.be/6Z3n_nfo5AU
Please find the model attached.
In this video tutorial I tried to simulate air bubbles in water. The result is quite pleasing, but due to the fact that surface tension is not taken into account, the bubbles look different. In this tutorial, a material flow is used for the multiphase simulation with the Interfoam solver, i.e. there is an inlet and an outlet.
Physics Model: transient, multiple phasis, viscous, laminar flow
2D Model
Fluid:water / air
Mesher: CfMesh
Solver Openfoam: interFoam
Link to the video: https://youtu.be/6Z3n_nfo5AU
Please find the model attached.
- Attachments
-
- Lesson14_Interfoam_Bubbles.FCStd
- (30.93 KiB) Downloaded 99 times
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Re: A new series of 10 tutorials about Freecad CfdOf
Thanks for the new video.Raedchen_im_System wrote: ↑Tue Jun 20, 2023 5:58 pm The result is quite pleasing, but due to the fact that surface tension is not taken into account, the bubbles look different.
Surface-tension: you can edit the sigma-parameter in transportProperties.
I ran the sim using a finer mesh + surface-tension, to get a better resolution of the bubbles.
max cell size 0,25 mm, 200000 cells. But there are still bubbles (the blue ones) with a smeared out
alpha-air, so the resolution is still too coarse.
- Raedchen_im_System
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Re: A new series of 10 tutorials about Freecad CfdOf
@thschrader : Thank you very much for your comments on the consideration of surface tensions in InterFoam! I linked your post in the description of my YouTube video.
Re: A new series of 10 tutorials about Freecad CfdOf
Hallo,
can you tell me how to add surface tension?
Thank you in advance!
can you tell me how to add surface tension?
Thank you in advance!