Fig. 10: Influence of squirmer-polymer size ratio on the rotational properties of squiremrs at \({{{\rm{Re}}}}=0.04\).
Dependence of (dashed lines) normalized rotational diffusion coefficients \({D}_{r}^{a}/{D}_{r}^{0}\) and (solid lines) rotational enhancements \({D}_{r}^{a}/{D}_{r}^{p}\) on particle radius. Here, β denotes active stress. Blue, red, and green lines correspond to pushers, pullers, and neutral swimmers, respectively. The monomer packing fraction is fixed at ϕ/ϕ0 = 1.13. Particle radii R are normalized by the polymer’s natural bond length \({\ell }_{0}^{n}=1a\). The theoretical rotational diffusion coefficient for a colloid of radius R = 3a at temperature kBT/ε = 0.0005 is \({D}_{r}^{0}=3.0\times 1{0}^{-9}\,{\tau }^{-1}\).
