I'm thinking to couple my fluid flow solver based on lattice Boltzmann method with a mechanical deformation solver based on finite element method to take account for solid deformation in my models. In fact, I'm looking for a fluid-structure interaction framework, which its fluid solver was written based on lattice Boltzmann. I didn't find any opensource example by using this coupling idea. Can anyone suggest any opensource software or direction how it is possible to do it?

  • $\begingroup$ This will be relatively complex, because FEM solvers for structures are generally written for unstructured meshes whereas LBM uses a cartesian grid with conformal decomposition. As far as I am aware, there is no such framework that exists. You might want to look into open source LBM framework such as OpenLB and Palabos and adapt them consequently... I think that the fact that LBM is an explicit method will however greatly hinder your efforts. $\endgroup$
    – BlaB
    Commented Sep 18, 2018 at 17:19
  • $\begingroup$ In fact, I have a LBM solver which works on unstructured meshes (not tetrahedralized meshes still it's regularized Cartesian grid but I approximate complex geometries with this fine Cartesian grid). $\endgroup$
    – GGG
    Commented Sep 18, 2018 at 17:35
  • 2
    $\begingroup$ Then your LBM solver does not use an unstructured mesh. If you approximate complex geometries using a fine Cartesian grid, you are using a structured cartesian grid to approximate the geometry... This is not an unstructured mesh... $\endgroup$
    – BlaB
    Commented Sep 18, 2018 at 19:54


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