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Figure 15 | BioMedical Engineering OnLine

Figure 15

From: Transient integral boundary layer method to calculate the translesional pressure drop and the fractional flow reserve in myocardial bridges

Figure 15

Influence of the wall velocity on boundary layer thickness, friction coefficient and wall shear stress. The bottom figure shows the normalised thickness of the boundary layer during in- (left) and outward motion (right) of the wall in the dynamic configuration presented in the third Additional file. Compared to zero wall velocity the boundary layer thickness in systole (ν w = 5.1 mm/s) is increased in the entrance region of the deformation while it is decreased in the outlet region, in diastole (ν w = -6.8 mm/s) the situation is vice versa. The influence on viscous friction and wall shear stress is small and thus the difference in pressure loss over the deformation compared to ν w = 0 is small (δp ≈ 1% of Δp).

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