Key result
Simulated moving indenting walls induce ~100% more oscillatory wall shear stress than rigid walls.
Why the study?
The effects of periodically excited arterial walls on oscillatory wall shear stress and flow structures were not well understood.
Population
Two-dimensional channel with dimensions of a human femoral artery
Comparison
Moving indenting lower wall vs time-varying upper and lower walls or fixed rigid walls
Design
Computational simulation using non-Newtonian incompressible Navier–Stokes solver
Authors
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Periodic wall motion may amplify oscillatory shear in models; leaves open its role in atherogenesis pending in vivo data.
Computational modeling demonstrates that periodic wall movement significantly increases oscillatory wall shear stress, which may provide insights into atherogenesis.
Ng et al. (2002) studied this question. Moving indenting wall vs. Rigid wall was evaluated on Oscillatory nature of wall shear stress (WSS) and flow structures. A moving indenting wall produced almost twice as much induced oscillatory wall shear stress as a rigid wall in a simulated two-dimensional channel.
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