Reynolds stress measurements within the outlet port of the Penn State LVAD

Author

Baldwin, J.T. ; Tarbell, J.M. ; Deutsch, S. ; Geselowitz, D.B.

Author_Institution

Pennsylvania State Univ., University Park, PA, USA

fYear

1990

fDate

26-27 Mar 1990

Firstpage

17

Lastpage

18

Abstract

A laser Doppler anemometer (LDA) was used to measure two components of velocity at 37 locations along the outlet port of a 70-cm ³ Plexiglas model of the Penn State electric left ventricular assist device (LVAD). The model ventricle was filled with a blood analog fluid and operated at normal physiological conditions. Two hundred and fifty realizations of the velocity components were measured at eight different times during the pump cycle. The collected data were processed to determine mean velocities and Reynolds stresses at each location and cycle time. The results reveal that a regurgitant jet which forms during diastole produces high mean velocities and potentially hemolytic Reynolds stresses

Keywords

artificial organs; cardiology; haemodynamics; Penn State electric left ventricular assist device; Plexiglas model; Reynolds stresses; blood analog fluid; haemolysis; laser Doppler anemometer; mean blood velocity; outlet port; pump cycle; regurgitant jet; velocity components; Blood; Linear discriminant analysis; Optical filters; Optical refraction; Optical scattering; Probes; Prosthetics; Pumps; Stress measurement; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioengineering Conference, 1990., Proceedings of the 1990 Sixteenth Annual Northeast

Conference_Location

State College, PA

Type

conf

DOI

10.1109/NEBC.1990.66269

Filename

66269