Key result
Numerical simulation of a 3D centrally-actuated artificial heart at 75 bpm demonstrated that a vortex ring forms in the diastolic cycle, providing good wall wash-out.
Numerical simulation of a 3D centrally-actuated artificial heart demonstrates that a vortex ring forms during diastole, potentially providing good wall wash-out.
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Supports exploration of vortex dynamics in artificial heart design; leaves open translation to clinical outcomes.
The unsteady flow within a simplified 3D centrally-actuated type artificial heart was investigated numerically using moving boundary technique. The velocities on the inlet and outlet were determined according to the motion of the diaphragm. The case with heart beat rate of 75 beats per minute (bpm) was simulated. Two models were studied. It is found that, in the diastolic cycle, a vortex ring forms in the conjunction of the blood chamber and the inlet tube. This vortex ring can provide good wash-out on the wall.
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Yang et al. (2007) studied this question. 3D centrally-actuated type artificial heart simulation was evaluated on Unsteady flow and vortex ring formation. Numerical simulation of a 3D centrally-actuated artificial heart at 75 bpm demonstrated that a vortex ring forms in the diastolic cycle, providing good wall wash-out.
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