Accessor for VISCOUS_CFL_LIMIT — tests reference this instead
of duplicating the literal.
pure function ocean_viscous_cfl_limit() result(lim) !! Accessor for `VISCOUS_CFL_LIMIT` — tests reference this instead !! of duplicating the literal. real(wp) :: lim lim = VISCOUS_CFL_LIMIT end function ocean_viscous_cfl_limit