  The spurious currents observed in multiphase flow simulations with
pseudo-potential lattice Boltzmann (LB) models are usually understood to be the
result of the lack of isotropy of the model-generated interaction force between
phases. Remedies have been proposed to utilize larger stencils to compute the
interaction force with higher orders of isotropy. In this short communication,
we point out the incompleteness in the current understanding and propose a new
consistent implementation to more effectively suppress the spurious currents.
We also demonstrate theoretically that certain low-level spurious currents
cannot be eliminated by increasing isotropy if the local hydrostatic balance
inside the diffuse interface is not established in the LB models.
