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\item Drag resistances from \citet{Burgers_1995}:\\  For a spherical particle: $F_{\rm drag}^{\rm sph}=6\pi\eta a V$.\\  For an end-on ellipsoid: $F_{\rm drag}^{\rm elle}=\frac{4\pi\eta a V}{\ln(2a/b_0)-0.5}$.\\ V}{\ln(2a/b_0)-0.5}$, where $a$ is half the length (think prolate) and $b_0$ is the equatorial radius.\\  For an end-on cylinder: $F_{\rm drag}^{\rm cyle}=\frac{4\pi\eta a V}{\ln(2a/b)-0.72}$ (slightly higher than ellipsoid).\\  For a face-on ellipsoid: $F_{\rm drag}^{\rm ellf}=\frac{8\pi\eta a V}{\ln(2a/b)-0.5}$.\\  For a face-on cylinder: similar to the face-on ellipsoid, but slightly higher.