Numeric flow simulation for an innovative ventricular assist system secondary impeller

S. Nakamura, Wei D Ding, W. A. Smith, L. A R Golding

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The secondary impeller of the Cleveland Clinic Foundation Innovative Ventricular Assist System heart pump is designed to pump the blood from the journal bearing through the annulus back to the discharge to rejoin the main flow. It is crucial, however, that the amount of hemolysis and potential for thrombus formation is minimized. Based on our earlier computational fluid analysis of the initial design, an improved secondary impeller has been proposed. The objective of this work was to analyze the flow with the new impeller configuration by computational fluid dynamics and to find out where in the geometry hemolysis becomes high, as well as where the potential for thrombosis exists. The present work includes: 1) visualizing the 3- dimensional flow pattern in the secondary impeller cavity, 2) investigating the tip clearance effect, and 3) estimating the shear stress distribution as a measure for blood damage caused in the secondary impeller cavity.

Original languageEnglish (US)
Pages (from-to)74-78
Number of pages5
JournalASAIO Journal
Volume45
Issue number1
StatePublished - Jan 1999
Externally publishedYes

Fingerprint

Flow simulation
Hemolysis
Thrombosis
Blood
Pumps
Heart-Assist Devices
Journal bearings
Hydrodynamics
Flow patterns
Stress concentration
Shear stress
Computational fluid dynamics
Fluids
Geometry

ASJC Scopus subject areas

  • Biophysics
  • Bioengineering

Cite this

Numeric flow simulation for an innovative ventricular assist system secondary impeller. / Nakamura, S.; Ding, Wei D; Smith, W. A.; Golding, L. A R.

In: ASAIO Journal, Vol. 45, No. 1, 01.1999, p. 74-78.

Research output: Contribution to journalArticle

Nakamura, S, Ding, WD, Smith, WA & Golding, LAR 1999, 'Numeric flow simulation for an innovative ventricular assist system secondary impeller', ASAIO Journal, vol. 45, no. 1, pp. 74-78.
Nakamura, S. ; Ding, Wei D ; Smith, W. A. ; Golding, L. A R. / Numeric flow simulation for an innovative ventricular assist system secondary impeller. In: ASAIO Journal. 1999 ; Vol. 45, No. 1. pp. 74-78.
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