Effect of Washout Hole Geometry on Flow in a Centrifugal Blood Pump

Abstract

Quantitative flow visualization analysis was performed to remove the origin of thrombogenesis to obtain the suitable design criteria. Particular attentions were paid to the relationship between the geometry of the washout hole and thrombus formation which might be related to the stagnation. As a result, the stagnation around the shaft was effectively washed by the washout holes, and the washout effect depends on the position and size of the washout hole.