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Less turbulence, please.

I refer to the letter by Peter Mucci (Your Voice, Professional Engineering No 3, 2019). In my view physics, materials science and fluid dynamics (and thermodynamics) form a fundamental basis to mechanical engineering.

A case in point: replacement heart valves, mitral or tricuspid, are usually either animal (porcine or bovine) or metallic, usually titanium. Animal valves have a life of about :o years, titanium twice as long or more.

However, titanium valves are more likely to cause clotting than animal valves and require more medication to thin the blood than do animal valves.

I think that this has no connection with the material, but due to turbulence in the blood flow. I presume that an animal valve is more 'streamlined' than is a titanium valve.

So could engineers involved with fluid dynamics or aerodynamics in aerospace or in Formula One apply their expertise to produce titanium mitral valves and tricuspid valves that will cause less turbulence?

Francis Brian Cowell, Hucclecote, Gloucestershire

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Title Annotation:Reaction: YOUR VOICE
Author:Cowell, Francis Brian
Publication:Professional Engineering Magazine
Article Type:Letter to the editor
Date:Jul 1, 2019
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