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TECHNICAL PAPERS

Unsteady Effects on the Flow Across Tilting Disk Valves

[+] Author and Article Information
Moshe Rosenfeld, Idit Avrahami, Shmuel Einav

Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel

J Biomech Eng 124(1), 21-29 (Aug 16, 2001) (9 pages) doi:10.1115/1.1427696 History: Received December 01, 1998; Revised August 16, 2001
Copyright © 2002 by ASME
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References

Figures

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The computational domain (not to scale)
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The physiological inflow waveform and the specified motion of the mitral valve
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Typical meshes in the vicinity of the valve in the closed (a) and open (b) positions (only every second mesh node is plotted in each direction)
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Mesh-independence test of the axial velocity distribution at a cross section downstream of the valve
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The flow field dependence on the spatial resolution (at the time of t=0.2 s)
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Time-step independence test of the axial velocity distribution at a cross section downstream of the valve
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The flow field dependence on the time-step (at the time of t=0.2 s)
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Time history of the transverse velocity component at the point (1.7H,0.6H) downstream of the valve (steady inflow case)
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Time sequence of the streamlines and the vorticity for one vortex shedding cycle (steady inflow case)
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Time history of the transverse velocity component at the point (1.7H,0.6H) downstream of the valve (pulsatile inflow case with a fixed valve)
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Time sequence of the streamlines and the vorticity for one cardiac cycle (pulsatile inflow case with a fixed valve)
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Time sequence of the streamlines and the vorticity for one cardiac cycle (pulsatile inflow case with a moving valve)
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The normal force on the valve
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The shear stress variation at the leading edge of the valve
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The transvalvular pressure drop variation

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