Absolute values of density-weighted kinematic vorticity ﹩\left|\rho {\omega }_{\perp }^{ij}\right|﹩ for all cases at the time when the growth rate of poloidal EM energy reach their peaks. The top and bottom rows show the distributions of ﹩\left|\rho {\omega }_{\perp }^{xz}\right|﹩ and ﹩\left|\rho {\omega }_{\perp }^{xy}\right|﹩ on the (x, z) and (x, y) planes, respectively. The different columns refer to the four binaries considered and four representative times. The distributions are rotated so as to highlight the different distributions of vorticity.