PIV Measurements of Flows in Artificial Heart Valves

Kaminsky, Radoslav; Kallweit, Stephan; Rossi, Massimiliano; Morbiducci, Umberto; Scalise, Lorenzo; Verdonck, Pascal; Tomasini, Enrico Primo

doi:10.1007/978-3-540-73528-1_4

Cited by 11 publications

(12 citation statements)

References 24 publications

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“…This resolution (equivalent to 8 red blood cell diameters, or 20 times red blood cell thickness) is at or near the limit at which blood may reasonably be modelled as a homogeneous fluid. For comparison, recent PIV measurements with physiological scale valve are at resolution of {135 µm, 67,000 µs} 27 and {1200 µm, 333 µs} 26 . The current resolution limit, achieved using a scaled-up valve, is {120 µm, 570 µs} 36 .…”

Section: Discussionmentioning

confidence: 99%

“…Particle Image Velocimetry (PIV) has been used extensively to measure the flow field in MHVs 5, [25][26][27][28][29] , its temporal and spatial resolution has not been sufficient to allow the integration of blood damage models along Lagrangian cell trajectories.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, for the most part, blood flow interacts with the valve when it is fully open, so even moderate thrombogenic conditions occurring during the main forward flow can potentially affect the patient's health. This is the reason why the main forward flow is still paid so much attention in recent experimental [25][26][27][28]31,32 and numerical 6,23,28,31,[33][34][35] investigation.…”

Section: Introductionmentioning

confidence: 99%

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High-Resolution Measurement of the Unsteady Velocity Field to Evaluate Blood Damage Induced by a Mechanical Heart Valve

Bellofiore

Quinlan

2011

Ann Biomed Eng

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-Resolution Measurement of the Unsteady Velocity Field to Evaluate Blood Damage Induced by a Mechanical Heart Valve

Bellofiore

Quinlan

2011

Ann Biomed Eng

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“…7). 17,26,[45][46][47]64,66,68,76,77,88,91,97,98,103,130,138 However, PIV methods were mainly two dimensional until Bru¨cker introduced Stereo-PIV based on the use of two digital cameras and PIV algorithms to study the flow past artificial heart valves. 21 The testing requirements for performing stereo-PIV for characterizing the flow through mechanical heart valves has been well described by Morbiducci et al 115 Another breakthrough in PIV was the development of defocusing digital particle image velocimetry (D-DPIV).…”

Section: Particle Image Velocimetry Of Heart Valvesmentioning

confidence: 99%

Emerging Trends in Heart Valve Engineering: Part IV. Computational Modeling and Experimental Studies

et al. 2015

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Abstract-In this final portion of an extensive review of heart valve engineering, we focus on the computational methods and experimental studies related to heart valves. The discussion begins with a thorough review of computational modeling and the governing equations of fluid and structural interaction. We then move onto multiscale and disease specific modeling. Finally, advanced methods related to in vitro testing of the heart valves are reviewed. This section of the review series is intended to illustrate application of computational methods and experimental studies and their interrelation for studying heart valves.

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“…Most recently, aortic BiMHV pulsatile flow measurements have been obtained using high-speed SPIV with an acquisition rate of 3 kHz but only for only a limited number of cycles due to memory limitations (Kaminsky et al 2007a(Kaminsky et al , 2008. Kaminsky et al (2007a) measured three velocity components on the centerline perpendicular plane and found that the out-of-plane velocity was highest in the recirculation regions near the sinus walls.…”

Section: Literature Reviewmentioning

confidence: 99%

Stereoscopic PIV of Steady Flow Through a Bileaflet Mechanical Heart Valve

Hutchison

Sullivan

Ethier

2008

ASME 2008 Summer Bioengineering Conference, Parts a and B

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The Reynolds number based on inlet diameter was 7600, and the measurement plane was perpendicular to the leaflet axes at the centerline of the aortic sinus. The typical formation of three jets was observed: the upper and lower lateral orifice jets, and the central jet. Flow separation from the valve ring was seen, and large scale vortices were identified in both the upper and lower sinus regions. An asymmetry in the reverse flow was found, and possible causes were discussed. All three jets were seen to decay similarly to free rectangular jets, with zero decay initially, followed by a 'linear' decay rate in which U max 2 ∝ X. The central jet was also seen to be self similar in the linear decay region. Analysis of the out-of-plane velocity yielded two alternate explanations of streamwise vortex (i.e. Ω x ) structure, with either a four-cell or an eight-cell streamwise vortex structure being present in the mean velocity field. Organization of large scale three dimensional flow structures was thus apparent. Calculation of in-plane Reynolds stresses showed that values were highest in the outer shear layers of the lateral orifice jets. Elevated Reynolds shear stress values were also found in the leaflet wake regions, and the shear layers of the central jet.iii

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PIV Measurements of Flows in Artificial Heart Valves

Cited by 11 publications

References 24 publications

High-Resolution Measurement of the Unsteady Velocity Field to Evaluate Blood Damage Induced by a Mechanical Heart Valve

High-Resolution Measurement of the Unsteady Velocity Field to Evaluate Blood Damage Induced by a Mechanical Heart Valve

Emerging Trends in Heart Valve Engineering: Part IV. Computational Modeling and Experimental Studies

Stereoscopic PIV of Steady Flow Through a Bileaflet Mechanical Heart Valve

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