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ISSN オンライン: 2642-0554

LARGE EDDY SIMULATIONS AND PARTICLE IMAGE VELOCIMETRY EXPERIMENTS WITHIN A BIMHV FLOW NEAR PEAK SYSTOLE

Adam Blackmore
Department of Mechanical and Industrial Engineering University of Toronto 5 Kings College Rd. Toronto, ON, M5S 3G8

Pierre E. Sullivan
Mechanical and Industrial Eng. University of Toronto Toronto, Ontario, M5S 3G8, Canada

要約

Comparing previous experiments (Hutchison et al. (2011)), and high resolution Large Eddy Simulations on a BiMHV flow at peak systole show significant differences in the central jet of the BiMHV. The LES results show flow separation at the valve leaflets with regions of significant shear between the central and outer jets not seen in the measurements. This is primarily caused by measurement errors because of the difficulty of extracting data from regions of high shear and optical−matching issues using PIV. However, evidence of the four cell structure described by Hanle et al. (1988) for both continuous and pulsatile flow and Hutchison et al. (2011) for continuous flow was also found with the LES results, suggesting that more experiments are required at peak systole and there is a need for some cautions when moving forward with cyclic measurements. Specifically, more effort must be spent capturing the high shear region of the central jet, as well as measurement planes perpendicular to the longitudinal axis of the aortic chamber.