  In a recent work [A. De Rosis, R. Huang, and C. Coreixas, "Universal
formulation of central-moments-based lattice Boltzmann method with external
forcing for the simulation of multiphysics phenomena", Phys. Fluids 31, 117102
(2019)], a multiple-relaxation-time lattice Boltzmann method (LBM) has been
proposed by means of the D3Q27 discretization, where the collision stage is
performed in the space of central moments (CMs). These quantities relax towards
an elegant Galilean invariant equilibrium, and can also include the effect of
external accelerations. Here, we investigate the possibility to adopt a coarser
lattice composed of 19 discrete velocities only. The consequences of such a
choice are evaluated in terms of accuracy and stability through multiphysics
benchmark problems based on single-, multi-phase and magnetohydrodynamics flow
simulations. In the end, it is shown that the reduction from 27 to 19 discrete
velocities have only little impact on the accuracy and stability of the CM-LBM
for moderate Reynolds number flows in the weakly compressible regime.
