Expected local small-dust-to-gas ratio at ﹩z=2{h}_{{\rm{g}}}﹩ (Equation (34)) for the parameters of Table 1 and different turbulence levels and ﹩{{\rm{\Sigma }}}_{{\rm{d}}}/{{\rm{\Sigma }}}_{{\rm{g}}}﹩. Dotted lines assume that the small dust is well-mixed (﹩{h}_{{\rm{d}}}^{(S)}={h}_{{\rm{g}}}﹩) and solid lines assume the scale height of small grains is set by collisional trapping and accurately described by Equation (33) using ﹩{c}_{1}=10﹩ and ﹩{y}_{1}=1﹩.