title: Investigation of the washout effect in a magnetically driven axial blood pump.
abstract: For a long-term implementation of the magnetically driven CircuLite blood pump system, it is extremely important to be able to ensure a minimum washout flow in order to avoid dangerous stagnation regions in the gap between the impeller and the motor casing as well as near the pivot-axle area at the holes in the impeller's hub. In general, stagnation zones are prone to thrombus formation. Here, the optimal impeller/motor gap width will be determined and the washout flow for different working conditions will be quantitatively calculated. The driving force for this secondary flow is mainly the strong pressure difference between both ends of the gap. Computational fluid dynamics (CFD) and digital particle image velocimetry (DPIV) will be used for this analysis.
authors.affiliation: Institut für Mechanik und Fluiddynamik, TU Bergakademie Freiberg, Germany. Michael.Triep@imfd.tu-freiberg.de
authors.forename: Michael
authors.initials: M
authors.lastname: Triep
authors.forename: Christoph
authors.initials: C
authors.lastname: Brücker
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Kerkhoffs
authors.forename: Oliver
authors.initials: O
authors.lastname: Schumacher
authors.forename: Oliver
authors.initials: O
authors.lastname: Marseille
mesh_terms: D003198:Computer Simulation; D004867:Equipment Design; D006353:Heart-Assist Devices; D006801:Humans; D008280:Magnetics / Q000295:instrumentation*; D008955:Models, Cardiovascular; D010316:Particle Size; D011312:Pressure; D012212:Rheology; D013927:Thrombosis / Q000517:prevention & control