Experimental and computational studies of the relative flow field in a centrifugal blood pump

T.H. Ng, W.K. Chan, Ching Man Yu, H.D. Li

Research output: Journal article publicationConference articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

The relative flow field within the impeller passage of a centrifugal blood pump had been examined using flow visualization technique and computational fluid dynamics. It was found that for a seven-blade radial impeller design, the required flow rate and static pressure rise across the pump could be achieved but the flow field within the blades was highly undesirable. Two vortices were observed near the suction side and these could lead to thrombus formation. Preliminary results presented in this article are part of our overall effort to minimize undesirable flow patterns such flow separation and high shear stress regions within the centrifugal blood pump. This will facilitate the future progress in developing a long-term clinically effective blood pump. The relative flow field within the impeller passage of a centrifugal blood pump had been examined using flow visualization technique and computational fluid dynamics. It was found that for a seven-blade radial impeller design, the required flow rate and static pressure rise across the pump could be achieved but the flow field within the blades was highly undesirable. Two vortices were observed near the suction side and these could lead to thrombus formation. Preliminary results presented in this article are part of our overall effort to minimize undesirable flow patterns such flow separation and high shear stress regions within the centrifugal blood pump. This will facilitate the future progress in developing a long-term clinically effective blood pump.
Original languageEnglish
Pages (from-to)119-125
Number of pages7
JournalCritical Reviews in Biomedical Engineering
Volume28
Issue number1-2
DOIs
Publication statusPublished - 1 Jan 2000
Externally publishedYes

Keywords

  • Computational fluid dynamics and flow visualization
  • Impeller design
  • Rotary blood pump

ASJC Scopus subject areas

  • Biomedical Engineering

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