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Critical Reviews™ in Biomedical Engineering
SJR: 0.207 SNIP: 0.376 CiteScore™: 0.79

ISSN Print: 0278-940X
ISSN Online: 1943-619X

Critical Reviews™ in Biomedical Engineering

DOI: 10.1615/CritRevBiomedEng.v28.i12.200
pages 119-125

Experimental and Computational Studies of the Relative Flow Field in a Centrifugal Blood Pump

B. T. H. Ng
Thermal and Fluids Engineering Division, School of Mechanical and Production Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
Weng Kong Chan
School of MPE, Nanyang Technological University, Singapore 639798
S. C. M. Yu
Thermal and Fluids Engineering Division, School of Mechanical and Production Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
HaiDong Li
Thermal and Fluids Engineering Division, School of MPE, Nanyang Technological University, Singapore 639798

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.


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