Aortic valve replacement with a valve prosthesis is necessary when the native valve is compromised. During the ejection phase of the heart, bioprosthetic aortic valves create turbulent flow which is suspected to negatively affect the valve's durability and performance. Depending on their design, the valve leaflets may exhibit periodic oscillations - so-called leaflet fluttering - making this a complex fluid-structure interaction problem.This video shows visualizations of the vortex development and breakdown past a fluttering and non-fluttering valve and demonstrates the effect of leaflet fluttering on laminar-turbulent transition.
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