title: Chirality-specific lift forces of helix under shear flows: Helix perpendicular to shear plane.
abstract: Chiral objects in shear flow experience a chirality-specific lift force. Shear flows past helices in a low Reynolds number regime were studied using slender-body theory. The chirality-specific lift forces in the vorticity direction experienced by helices are dominated by a set of helix geometry parameters: helix radius, pitch length, number of turns, and helix phase angle. Its analytical formula is given. The chirality-specific forces are the physical reasons for the chiral separation of helices in shear flow. Our results are well supported by the latest experimental observations.
authors.affiliation: Department of Mathematics and Physics, Chongqing University of Science and Technology, Chongqing, People's Republic of China.
authors.forename: Qi-Yi
authors.initials: QY
authors.lastname: Zhang
keywords: chiral objects; chiral separation; screw; slender-body theory; vorticity direction