Chiral propulsion: the method of effective boundary conditions

We revisit a problem of computing the chiral propulsion for bodies with helical symmetry in a fluid at low Reynolds numbers. Using the method of effective partial slip boundary conditions (PSBC) we compute the propulsion coefficient in the limit of small pitch of the helix. We check the method by comparing the results with the Lighthill solution for an infinite flagellum. The universality of the chiral propulsion in the limit of small pitch is discussed.