Filiform microswimmers in tubular confinements

We present a novel framework using regularized Stokeslet surfaces and regularized Stokeslet segments to model long, filiform swimmers inside tubular confinements of arbitrary geometry. Swimmer motion results from the dynamic interaction between time-varying preferred curvatures and elastoviscous forces, which depend on properties of the fluid and flagellum, and the confinement geometry. The image demonstrates that the no-slip condition at the tube wall is maintained while the swimmer moves downward.