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FIG 2. Curved artery with saccular aneurysm.
A, Instantaneous velocity vector plot of flow in curved arterial segment with saccular aneurysm during deceleration portion of systole.
B, Continuous particle paths for t* = 200–400 for fully developed saccular aneurysm model. Initially the particles were aligned across the main lumen at the location of the proximal aneurysm neck.
C, Instantaneous pressure contours during deceleration portion of systole for the curved arterial model with a fully developed aneurysm. Shown here are pressure contours at dimensionless time, t* = 245. Here, contour A corresponds to a value of 0.531 dpu (dimensionless pressure units) while contour M corresponds to a value of 0.563 dpu.
D, Pressure history plot for curved arterial segment model with saccular aneurysm showing pressure at proximal and distal aneurysm necks over one cardiac cycle. Curve A corresponds to the segment inlet, Curve B corresponds to the proximal aneurysm neck site (node 851) and Curve C corresponds to the distal neck site (node 1251).
E, Time history plot of shear rates at proximal and distal aneurysm necks. Curve A and B correspond to the proximal (node 851) and distal (node 1251) neck sites, respectively. Note that the shear rate values at the distal neck exceed those of the proximal neck throughout the entire cardiac cycle.
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