mathias
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The simulatio is unstable. There can be many reasons for it. Have you tried a finer resolution? You can stop the simulation shortly before it gets to infinity and output the results and check for the results in oder to find a possible source by looking at the location of high values.
All particle related code parts does not support GPU usage yet.
Interesting, yes! And same cubic mesh alligned sencils mentoned in the publication might be realizable in OpenLB. It would be good to see a convergence study with absolute errors stated for benchmark cases to be compared with standard LBM stencils. For some problems, like radiative trasport equation, there is a similar sencil already implemented. Please, check for the publications of McHardy and Mink.
1/ If you aim at resolved simulations (resolved particles and bubbles), I would go for phase field and HLBM resolved particles.
2/ Can be done in OpenLB without any external tools, since in OpenLB there is DEM (point particle and resolved particles with HLBM). Coubling with other tools are possible but in general not really efficient, esspiecially using CPU/GPU clusters!This method is refferred to as “Free Surface” in the context of LBM. It does model surface tension but not he gas phase. If you want to also model the gas dynamics, you should use a multi-phase/component method as “pseudo potential”, “free engergy” or “phase field”.
Such detailed support we cannot offer in the framework of the forum. You may consider coming to the next spring school or look into the options here https://www.openlb.net/consortium/.
You are asking for detailed support which is beyond the scope of the forum. You may consider our next spring school or https://www.openlb.net/consortium/ .
You are asking for detailed support which is beyond the scope of the forum. You may consider our next spring school or https://www.openlb.net/consortium/ .
There will be an update in the next release. Yet, we need your and the other users and developeres support, see https://www.openlb.net/consortium/.
Without knowing details, it is not possible to help you. In the spring school we explain step by step how to do it and also in the user guide is a section on it. Individial support we can also offer based on a support contract. If so, please contact the OpenLB team using the contact form.
Did you check on the material numbers? Are they set correctly?
Difficult to answer. It depents on your experience in CFD and C++-programming. A good start in OpenLB provides our anually spring school!
Yes, OpenLB uses MPI and it is working fine, see all examples on that topic. You can use git bisect in oder to find the last version of your code which was working.. “Since I have modified the code in many files”.
Did you initialize the fields also at nodes with material number zero? Any fields needs to be initialized at all material numbers correctly!
Have a look at our user guide and maybe come to our next Spring School!