[Leaf]

Hi, Shaun,
Paraview only recognizes a vector with 3 components. So you should output your velocity in 3 components or use Calculator to generate a vector with “iHat/jHat/kHat”. Take reference to the following website.

http://www.paraview.org/Wiki/Advanced_Tips_and_Tricks
https://wiki.scorec.rpi.edu/wiki/Tutorial:Using_ParaView

[Leaf]

Hi, simoncks1994,
Are you trying to simulate conduction equation or other special equations? You may refer to Ref.[1]. Though I haven’t check the derivation, there are papers[2] using its design. May it help you.

[1]. Mohamad, A.A., Lattice Boltzmann Method: Fundamentals and Engineering Applications with Computer Codes. Vol. 51. 2011: Springer.
【1】R. Mcculloch, and H. Bindra, “Coupled Radiative and Conjugate Heat Transfer in Participating Media Using Lattice Boltzmann Methods,” Comput. Fluids, 124, 261-269 (2016).

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Quote from mathias on August 26, 2016, 09:22rnHi,rnrnyou can look for publications of Li-Shi Lou https://www.odu.edu/directory/people/l/lluo . rnrnBestrnMathias

rnrnThank you so much.

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Quote from ivan on March 7, 2016, 14:36rnHello, everybodyrnrnA couple weeks ago I have started working with OpenLB without any previous knowledges of Linux, CFD or C++ (Only C) and obviously I’m having a hard time. Do you guys know any tutorials or anything else that could help besides the material avaliable on the website? rnrnThank you for the attention rnrn:)

rnrnHi, Ivan,rn I have several documents concluded by myself. It may help you. If you need, contact with me.

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Quote from aliiab on November 27, 2015, 08:30rnHello!rnrnI’m a beginner in LBM and OpenLB. I tried to run some of the example projects (aorta3d). Everything was ok. And I got the results in the console output. But I can’t see the visualization using Paraview. I have opened all the pvd files, runned the simulation, but I saw only two parallelepipeds. Maybe, I have to make some additional settings for visualization in Paraview?rnrnThanks.

rnrnHi, Aliiab,rn How about trying to change your Representation and Coloring choice of your data in Properties viewer, if right now your choice is Outline in Representation and Solid Color in Coloring.rn

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Quote from josepedro on November 16, 2015, 21:00rnDear forum users,rnrnI want to implement a wall that have a anechoic condition.rnThis wall was presented in this article:rnNon-Reflecting Boundary Conditions for One-Step LBM Simulation of Aeroacoustics – 2006 (Kam)rnrnHow can I find the collide operation in OpenLB?

rnrnrnHi, Josepedro,rn Here are all the model supported in OpenLB 0.9. The “”dynamics”” classes are mainly reloaded for collision model, and “”momenta”” for macro parameters model, like density, velocity. You can check the most similar class name to your boundary model to see if it meets your need.rnhttp://pan.baidu.com/s/1kTuA56Z password:0nghrnhttp://pan.baidu.com/s/1bnsjbmJ password:8o48

[Leaf]

Hi, Jose,rn I tried to figure out the model you used in your Matlab code. I can’t find your boundary dealing code. And your OpenLB also missed the boundary dealing. So in OpenLB, the population for your missing direction i on the boundary, which means it’s coming from outside of your calculating domain, would just be the value of the direction i+4 or i-4.

[Leaf]

Hi, Jose,rn I don’t think the data type would be the prime reason here. Are you sure that you do the same collision and stream algorithm with OpenLB? Especially the collision, there are bunch of equilibrium distribution models for different problems.They would make the result quite different. And the boundary dealing are the same. Make sure you pick the same algorithm for your collision and boundary dealing. rn What’s more, why you try to implement the same problem under Matlab and OpenLB?

[Leaf]

Hi, Jose,rn I haven’t compared LBM wroten in Matlab and OpenLB. But it’s very common to get results with different accuracy for the same algorithm even under the same code language. It’s relevant to your model and boundary dealing. Sometime, it may even be caused by your float type selection, double or float. So I suggest that you compare the model, the boundary dealing and even the data type. What’s more, your description should be more detail. It’s hard to analyse your problem.

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Quote from astrohome on July 16, 2015, 13:40rnI’ve found the error – one should never use “”-j”” option. If I run just “”make”” it works (with several warnings and files not found but still it goes straight to finish).

rnYes, I search the function of -j var. It’s very sensitive to the makefile. If you use this, you must make sure that in your makefile, the dependent relationship is clear and execution sequence can be predictable.

[Leaf]

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Quote from astrohome on July 16, 2015, 13:40rnI’ve found the error – one should never use “”-j”” option. If I run just “”make”” it works (with several warnings and files not found but still it goes straight to finish).

rnCongratulations

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Quote from astrohome on July 16, 2015, 13:13rnPlease find the full log of command “”make -j8″” : http://pastebin.com/2GnaFamL

rnrnHey, astrohome, rnI can’t open the link you posted. Could you paste a detail description of one error in text or send me a copy directly. Maybe I can help find something.

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Quote from marcanyada on July 14, 2015, 07:24rnHi openlb12,rnrnI am currently also working in the same direction. For the adiabatic boundary I have been using the bounce-back boundary, since the lattice descriptor for the thermal variables only has velocities in perpendicular and parallel directions to the wall (based on the assumption that your boundaries are aligned with the coordinate system). I hope it’s useful.rnrnRegards, marcanyada

rnrnHey, Marcanyada,rn Thank you for your reply. If possible, could you send me an email, so we can discuss efficiently and timely. What’s more, about the bounce-back boundary, which boundary dynamic class do you select? Could you give me your boundary code? rnrnHere is my email address, openlb12@163.com.

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hey, Mathias.rn I finally succeeded in compiling OpenLB under windows with Eclipse(IDE) using Cygwin. But I changed several code files(which seems unbelievably unreasonable) and delete some non-using files. The project can run and do some debug. But it still remains several problems. Are you interested in building an official version of windows OpenLB? Maybe we can do some work together. What’s more, could I publish it in the Forum, so that more people can help fix the problem and create a more perfect version. Thanks a lot!rnrn PS:rn If anyone of you is interested in OpenLB windows version, plz contact me, my e-mail is openlb12@163.com

[Leaf]

Ok, please give me your e-mail address. And about the suggestion of Mathias, could you send me a copy? My email address is openlb12@163.com

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