title: Analysis of flow patterns in a ventricular assist device: a comparative study of particle image velocimetry and computational fluid dynamics.
abstract: In order to develop a diaphragm-type ventricular assist device (VAD), we studied the flow field change following structural modifications. We devised a center flow-type pump by putting a small projection on the center of the housing and/or diaphragm to provide a center in the flow field, and examined the following four types of VADs: N type without a projection, D type with a projection on the diaphragm, H type with a projection on the housing, and DH type with projections on both the diaphragm and housing. Computational fluid dynamics (CFD) was used for flow simulation. Particle image velocimetry (PIV) was also used to verify the reliability of the CFD method and to determine how the flow field changes in the presence of a projection. The results of the PIV and CFD analyses were comparable. The placement of a projection on the housing was most effective in rectifying the flow field.
authors.affiliation: Department of Surgery, Division of Clinical Medical Sciences, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan. satoktts@hiroshima-u.ac.jp
authors.forename: Katsutoshi
authors.initials: K
authors.lastname: Sato
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Orihashi
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Kurosaki
authors.forename: Asako
authors.initials: A
authors.lastname: Tokumine
authors.forename: Shintaro
authors.initials: S
authors.lastname: Fukunaga
authors.forename: Shinji
authors.initials: S
authors.lastname: Ninomiya
authors.forename: Taijiro
authors.initials: T
authors.lastname: Sueda