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Experimental Mechanics @
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Recent
Research: Prosthetic Heart Valves |
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Work
has focused on the simulation of the left ventricle and aortic valves in the human
heart as a virtual test bed for novel designs of prosthetic valves. The wide applicability of the work has been
ensured by employing a commercially available numerical code capable of
modeling fluid-solid interactions (FSI).
LS-DYNA has been used to model tissue as being non-linear elastic and
the blood as linear fluid but with realistic Reynolds numbers. Validation of the models has been achieved
using data from laboratory based pulse duplicators. The example below shows the inner wall
of the left ventricle being squeezed
and twisted under the action of heart
muscles (left) and a model of the aortic valve and surrounding structures
(right) |
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Click here for a blood flow out of the left ventricle through
the aortic orifice Click here for flow and stress data in the aortic valve during
the cardiac cycle. |
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For information about these studies see:
CARMODY,
C.J., BURRIESCI, G., HOWARD, I.C., PATTERSON, E.A., 2005 ‘An approach to
the simulation of fluid-structure interaction in the aortic valve’, J.
Biomechanics, in press or click here |
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