So this was fixed in a recent version….

Houdini 15.0.421: Fixed an issue in the finite element solver that was preventing the parameters External Velocity Field and External Velocity Offset from being applied in a simulation.

Although the documentation of how to use an “External Velocity Field” in a finite element solver is a bit sparse.

Has anyone got a super simple use of a bit of cloth being lifted by rising smoke in a sim, using the “External Velocity Field” in the drag parameters of a cloth object?