Cumulant collision operator

[eulerboiler]

Hi, I recently came across a demonstration of a 2d cavity flow simulation with extremely high Reynolds numbers, using the Cumulant Lattice Boltzmann method, which seemed interesting and was wondering if I could replicate the results in OpenLB.

I see that there is a cumulant dynamics descriptor within the src folder of olb1.8 and 1.7, but nothing mentioning it in the available dynamics list.

Am I correct in thinking that although the base of implementing the cumulant method, there is no version of it thats “pre-made”? I am a complete beginner at C++ and not sure if I am understanding the structure of the objects.

Thank you

[stephan]

Dear eulerboiler,

that is correct, we have a cumulant dynamics in OpenLB 1.8.
It is however limited to a specific lattice in three dimensions.
You could try yourself and implement a 2D version (if you have a reference with the specific equations to be coded).

If you need support for these kind of things, please consider visiting our yearly spring school (https://www.openlb.net/spring-school/).
Otherwise, you are welcome to share your progress in this forum.

BR
Stephan

[Author]

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