Hello Henderson,
I assume that you mean the two surface resolved particle examples (sedimentation3d and dkt2d).
In OpenLB 1.5 the dynamics have been completely reworked. In the process, most forcing schemes were removed, since studies have shown that the exact difference method of Kupershtokh leads to the most accurate results [1].
If you want to manually change the used forcing scheme, you can modify the apply
function of the PorousParticle
struct in src/dynamics/porousBGKdynamics.h.
Kind regards,
Jan
[1]: https://doi.org/10.3390/computation9020011