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Updated: Aug 7, 2026

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
Published on: July 19, 2016
Visualization study of the transient flow in the centrifugal blood pump impeller
Tomonori Tsukiya1, Yoshiyuki Taenaka, Eisuke Tatsumi
1Department of Artificial Organs, National Cardiovascular Center, Osaka, Japan.
Abstract:
Rotary blood pumps as a left ventricular assist device have several advantages over the use of existing pulsatile devices used for this purpose. The relative velocity distribution to the rotating impeller was observed by high-speed videography and particle image velocimetry (PIV) with the purpose of characterizing the unsteady fluid motion in the impeller and assessing antithrombogenicity based on the fluid dynamic properties within the flow path. Flow visualization in the present study has clearly shown the existence of drastic transient motion of flows in the impeller. The secondary flows developed in the passage, which are adverse in terms of hydrodynamic efficiency, contributed to the washout conditions on the blood contacting surface.
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