  We investigate the hydrodynamic helicity polarization of $\Lambda$ hyperons,
defined as the projection of the spin polarization vector along the directions
of particle momenta, at RHIC-BES energies by utilizing the relativistic (3+1)D
CLVisc hydrodynamics framework with SMASH initial conditions. As opposed to
local spin polarization at high energy collisions, our hydrodynamic simulations
demonstrate that the helicity polarization induced by the kinetic vorticity
dominates over other contributions at intermediate and low collision energies.
Our findings provide an opportunity to probe the fine structure of local
kinetic vorticity as a function of azimuthal angle at intermediate and low
collision energies by mapping our predictions to the future measurements in
experiments.
