![József Nagy](/img/default-banner.jpg)
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József Nagy
Австрия
Добавлен 6 сен 2014
Hello everyone!
Thisss is József Nagy here and welcome to my RUclips channel.
OpenFOAM is the main focus of my tutorial videos. You will find videos on tutorials for OpenFOAM and also on helpful tips like installing OpenFOAM and running simulations in Linux and Windows 10.
I am also posting community videos, where you can feel free to discuss different topics and help each other.
If you have questions, feel free to post them in the comment section!
If you like the videos please like, share and subscribe.
I would like to thank you for watching and listening and I hope to see you next time!
Thisss is József Nagy here and welcome to my RUclips channel.
OpenFOAM is the main focus of my tutorial videos. You will find videos on tutorials for OpenFOAM and also on helpful tips like installing OpenFOAM and running simulations in Linux and Windows 10.
I am also posting community videos, where you can feel free to discuss different topics and help each other.
If you have questions, feel free to post them in the comment section!
If you like the videos please like, share and subscribe.
I would like to thank you for watching and listening and I hope to see you next time!
Update and longevity of OpenFOAM - CFD Summer series 2024
This material is published under the creative commons license CC BY (Attribution). If you plan to use it, please acknowledge it.
Просмотров: 473
Видео
Case setup in OpenFOAM - CFD Summer series 2024
Просмотров 696День назад
This material is published under the creative commons license CC BY (Attribution). If you plan to use it, please acknowledge it.
Meshing with OpenFOAM - CFD Summer series 2024
Просмотров 1,2 тыс.14 дней назад
This material is published under the creative commons license CC BY (Attribution). If you plan to use it, please acknowledge it.
What the h*ll is OpenFOAM? Explained with a PIZZA!
Просмотров 13 тыс.Год назад
In this video I talk about #OpenFOAM. What it is and what it isn't. I give you a template to use for your own #simulation and bake a #pizza in the meantime. Link to the files used in the video: github.com/jnmlujnmlu/OpenFOAMTeaching/blob/master/JozsefNagy/simulationTemplates/steadyState/baseCase.zip Link to the video with the unifying geometry step: ruclips.net/video/OfQhOeZGdbI/видео.html Link...
I missed this in my CFD geometry workflow for OpenFOAM simulations for years. This is how I fix it.
Просмотров 23 тыс.Год назад
In this video I tell you the story how I fixed my #geometry workflow for #CFD simulations in #OpenFOAM using the open-source tool #blender. These are the lines you have to enter: line 3: import os line 189: header = os.path.basename(filepath)[0:-4] Here are the links to the older two videos on geometry creation: ruclips.net/video/FwkOjNOXg8M/видео.html ruclips.net/video/b0h8MxEMQPM/видео.html H...
[Community video] - CFD Summer 2022 - OpenFOAM being an intrinsic part of research
Просмотров 1,1 тыс.Год назад
In this video I talk about how OpenFOAM can be an intrinsic part of research. This material is published under the creative commons license CC BY (Attribution). If you plan to use it, please acknowledge it.
[Community video] - CFD Summer 2022 - YouTube's Community Tab
Просмотров 3552 года назад
In this video I would like to draw your attention to the Community Tab on my RUclips channel. You can learn a lot by visiting it. I post regularly. This material is published under the creative commons license CC BY (Attribution). If you plan to use it, please acknowledge it.
[Community video] - CFD Summer 2022 - New versions of OpenFOAM
Просмотров 1,6 тыс.2 года назад
In this video I talk about the recent releases of OpenFOAM v2206 and v10. Let me know in the comments below you opinion! This material is published under the creative commons license CC BY (Attribution). If you plan to use it, please acknowledge it.
How to install OpenFOAM in Windows 11- 2022
Просмотров 53 тыс.2 года назад
In this video you can learn, how you can install OpenFOAM in Windows 10 and Ubuntu in 2021 and 2022. Commands: curl dl.openfoam.com/add-debian-repo.sh | sudo bash sudo apt-get install ca-certificates sudo apt-get update sudo apt-get install openfoam2206-default openfoam2206 Download the elbow_quad.msh and elbow_tri.msh files here: github.com/jnmlujnmlu/OpenFOAMTeaching/tree/master/JozsefNagy Ch...
[Community video] - CFD Summer 2022 - The OpenFOAM Journal
Просмотров 8132 года назад
In this video I talk about the OpenFOAM Journal and the perks you get if you check it out! journal.openfoam.com This material is published under the creative commons license CC BY (Attribution). If you plan to use it, please acknowledge it.
Patreon Special OpenFOAM Q&A video release
Просмотров 8812 года назад
I recorded this video last year for my Patrons only, they were so nice, that I am allowed to share it with all of you! Big shoutout to all my Patrons. Please consider supporting me as a Patron. Thank you! Chapters: 0:00 Intro 0:39 Welcome 1:05 Q1: fvSolution and matrix solvers 11:13 Q2: cfMesh in OF v9 19:29 Q3: thin plate baffles porous media 26:49 Q4: conjugate heat transfer BC 45:01 The end ...
Community Christmas Competition V - Simulation of the flow around a sphere - Winner
Просмотров 5932 года назад
It is finally here, the winner of the fifth edition of the Community Christmas Competition! You can check out the PDFs here: github.com/jnmlujnmlu/OpenFOAMTeaching/tree/master/JozsefNagy/CommunityChristmasCompetition/competition-2021 The topic is the continuation of the first live stream series: The flow around the sphere. The live streams can be found in this playlist: ruclips.net/p/PLcOe4WUSs...
Community Christmas Competition V - Simulation of the flow around a sphere - Participants - Voting
Просмотров 1,1 тыс.2 года назад
It is finally here, the fifth edition of the Community Christmas Competition! In this video you will learn about the participants and their results. PLEASE VOTE IN THE COMMENT SECTION BELOW! You can check out the PDFs here: github.com/jnmlujnmlu/OpenFOAMTeaching/tree/master/JozsefNagy/CommunityChristmasCompetition/competition-2021 The topic is the continuation of the first live stream series: T...
How to install OpenFOAM in Windows 10 and Ubuntu - 2021 and 2022
Просмотров 64 тыс.2 года назад
How to install OpenFOAM in Windows 10 and Ubuntu - 2021 and 2022
Community Christmas Competition V - Simulation of the flow around a sphere - CHANGED DEADLINE!!!
Просмотров 7452 года назад
Community Christmas Competition V - Simulation of the flow around a sphere - CHANGED DEADLINE!!!
[Community video] - Community Christmas Competition V - Simulation of the flow around a sphere
Просмотров 1,1 тыс.2 года назад
[Community video] - Community Christmas Competition V - Simulation of the flow around a sphere
[Community video] - Thermal simulations in OpenFOAM Part 2 (externalWallHeatFluxTemperature BC)
Просмотров 4,1 тыс.3 года назад
[Community video] - Thermal simulations in OpenFOAM Part 2 (externalWallHeatFluxTemperature BC)
[Community video] - Installation details in OpenFOAM
Просмотров 1,2 тыс.3 года назад
[Community video] - Installation details in OpenFOAM
[Community video] - Thermal simulations in OpenFOAM
Просмотров 8 тыс.3 года назад
[Community video] - Thermal simulations in OpenFOAM
Overset mesh simulation project tutorial in OpenFOAM (mesh and simulation)
Просмотров 15 тыс.3 года назад
Overset mesh simulation project tutorial in OpenFOAM (mesh and simulation)
cfMesh hack for 3D OpenFOAM meshes and simulations #Shorts
Просмотров 2,3 тыс.3 года назад
cfMesh hack for 3D OpenFOAM meshes and simulations #Shorts
Online International Meeting for Users of OpenFOAM IV - P3 - Pereira, Castro and Nobrega
Просмотров 7263 года назад
Online International Meeting for Users of OpenFOAM IV - P3 - Pereira, Castro and Nobrega
Online International Meeting for Users of OpenFOAM IV - P2 - Rodrigues and Ramoa
Просмотров 4763 года назад
Online International Meeting for Users of OpenFOAM IV - P2 - Rodrigues and Ramoa
Online International Meeting for Users of OpenFOAM IV - P1 - Elmorsy
Просмотров 6443 года назад
Online International Meeting for Users of OpenFOAM IV - P1 - Elmorsy
Online International Meeting for Users of OpenFOAM IV - Schedule
Просмотров 5793 года назад
Online International Meeting for Users of OpenFOAM IV - Schedule
OpenFOAM Technology Primer now under CC #Shorts
Просмотров 1,3 тыс.3 года назад
OpenFOAM Technology Primer now under CC #Shorts
Online International Meeting for Users of OpenFOAM IV - Announcement
Просмотров 1,6 тыс.3 года назад
Online International Meeting for Users of OpenFOAM IV - Announcement
Community Christmas Competition IV - Simulation of the backward facing step - Winner
Просмотров 7873 года назад
Community Christmas Competition IV - Simulation of the backward facing step - Winner
First issue image of the OpenFOAM Journal - Poll - journal.openfoam.com
Просмотров 1 тыс.3 года назад
First issue image of the OpenFOAM Journal - Poll - journal.openfoam.com
Community Christmas Competition IV - Simulation of the backward facing step - Participants
Просмотров 1,2 тыс.3 года назад
Community Christmas Competition IV - Simulation of the backward facing step - Participants
you are very fast, please do it slow
I got some idea as to how we define the direction of the patch numbering based on the orientation of the surface normal vector. But let's consider the outlet patch with orientation 4 7 15 12. Is it acceptable to consider starting from other numbers (while maintaining direction) say 7 15 12 4 ?
Yes this should work also.
Will you go through some advance topics, for example how to implement meshless method in openfoam?
No, this is very specific and I am not even sure possible without a lot of additional effort.
Thank you for the useful information
I am glad to help.
What do you think about gpu parallelization with openfoam? will it ever be implemented in the main of releases?
They are working on it, however unfortunately "only" the solution of the matrix equations will be handled by the GPU, everything else will still be handled by the CPU. I am still looking forward to it.
@@OpenFOAMJozsefNagy Thanks for the reply. What are your opinions on yocto/zeptofoam and exafoam? I wanted to port OpenFOAM with petsc4foam and Amgx on GPU but there are sadly no tutorials around. With the unbelievable speed of GPU calculations seen in multiple studies, in lagrangian methods like SPH and DEM as well as in Fluent and M-Star it would be great to see OpenFOAM making use of the performance. Maybe a video on it would be awesome: Thanks for the great work for the community
Will results change based on openfoam version like for v4 and v7 will it change for multiphase simulations
I am not sure for those specific versions. Maybe because v4 is _very_ old. Differences between newer versions should not.
Hi József, Thanks a ton for the amazing videos!!!! I was wondering if there is a way to specify volumetric flowrate of gas and water at the inlet. As in, can I specify something like I need 10m3/h of gas and 0.5m3/h of water entering from the inlet? Please advise. Thank you!!
Yes, google the flowRateInletVelocity BC.
in my opinion the most difficult and valuable physics is phase change and multi-phase solvers which is very ambiguous in openFoam... everything else is kindergarten...
Yes phase change is a challenge.
19 minutes 10 views. I fell off...
i thought more people use interFoam 🙂interesting!
I am thankful that you guys exist for OpenFOAM. I would assume you have answered this many times but I wanted to know this, what was the idea behind making OpenFOAM free? It's an incredibly powerful tool and I've used it in several projects to just get a second set of eyes. It's performed quite well for most cases. The steady level of development that goes into maintaining this software makes me feel more and more confident. Thank you very much for the video!
Well it was made open source back in 2004. I am not sure about the reasoning back then. As for the reasoning to go forward with this, I guess it is a very good advertisement for every company to have something for free. Customers can either spend their own time or their own money for support.
Thank you Josef for inspiring me. I have project in 2D, but it is time to make it in 3D.
2D is a bit different. You can check out my playlist on turbulence modeling, there I have a 2D case. On Patreon I have an entire simulation project on a 2D case.
Hi Jozef, it looks like you don't get a summer vacation, just for laughs! 😂
Don't worry next week I am gone, but still a video will be posted.
If you have please some files of open foam courses we need it 🙏🙏
Really happy after seeing you again. Thankyou sir.
Hey Mr. József Nagy, I wish you a happy weekend. I learn a lot from you, sir.
Hi! Before use the stl file we can use surfaceCheck to check the stl quality. I have a case with a stl very larger (like a 3 meters) and with thickness small (10 milimeters). Do you have some idea how i can do a mesh clear with openFoam? Or another open source software?
Not with OpenFOAM. Blender?
Hi, by the way, it wasn't just your hair that moved; it looks like the entire studio where you're recording the video did too, haha. Regarding the content, your old material might still be useful, and there are plenty of videos covering the same subject. May I suggest creating content on tackling real projects using OpenFOAM to solve real-world problems? This could involve customizing OpenFOAM solvers and cases.
The problem with this is that these projects are very problem specific problems which are interesteing to some viewers.
Jozsef, thank you!
I just wish snappy worked well with prism cells on the boundary layer 😢
Yes, layers are still an issue in snappy. Did you try cfMesh? Sometimes layers are better there.
@@OpenFOAMJozsefNagy Yes. It worked better, but the free version of cfmesh is not even close to commercial softwares, sadly. I could only make 10 layers with barely passable quality, while my colleagues using ansys can easily pop out 30+ layers I guess it is a waiting game, or eventually helping improve the mesher myself. I did look for 2 months on the issue thinking the problem was with me. Eventually I found no other opensources meshers better than cfmesh for 3d
@@OpenFOAMJozsefNagyby the way, thank you for your lessons on youtube. I specially followed the one on the rotating fan to be able to make a turbine myself
@@arthurfraco2970 Great! I am glad it helped you!
Hi @@OpenFOAMJozsefNagy! is cfMesh free or does require license?
Thank you very much for the amazing tutorial videos!! I just wanted to know how do we interpret the alpha values between 0 and 1. If the alpha value is say 0.05 at a location, does it mean that there is mist present there? As in is the simulation predicting there are small liquid droplets in the vapor at that location? Or do we interpret it as approximately 0 hence fully vapor?
It is a numerical value. Has nothing to do with reality. This is why the number of these cells should be kept to a minimum.
@@OpenFOAMJozsefNagy Thank you for your response!! Which method would you recommend if one is interested in knowing how much liquid is carried over/entrained in the gas phase in form of mist or droplets?
Thank you very much, very well explained.
Sir, you are the best. Thanks
Thanks for sharing
I do wonder what the benifet of this is vs just using FreeCAD's cfdOF tool to name faces and the meshing tool in it?
Also does a program like Fusion 360 have similar functionality or does Blender allow for more ability to create meshes?
Thanks József!
It is possible to do Moldflow Simulation as CFD or with OpenFoam? Moldflow would consider flow, heat transfer, volume reduction in a form and changing from liquid to solid in several steps.
I doesn't seem to work anymore on Blender 4.1 It removes the "exported from blender" but the first line only has "solid"