Multi-Objective Optimisation of a Novel Bypass Graft with a Spiral Ridge

Figures

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  Figure 1. Computational configuration of the graft and host artery for the multi-objective optimisation study, here presented for a case with two ridges: CSR is the occlusion area; H and W are the ridges’ height and width; α is the trailing edge orientation; θ is the anastomosis angle; and L is the ridge length.

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  Figure 2. Comparison of the different candidates’ performances compared with the reference case with no ridge (red line): positive values denote improved performance compared with the reference solution. Please refer to Table 4 for the scale/numbers shown in each figure.

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  Figure 3. Comparison of the configuration of the reference, the baseline ridge design, and the optimised results of the current work.

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  Figure 4. Secondary velocity profiles in three monitoring planes positioned 2 mm, 6 mm, and 50 mm after the anastomosis.

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  Figure 5. Wall shear stress contours on the arterial wall projected on a flat surface: the area near the graft anastomosis with WSS < 1 Pa has been marked with blue and white stripes.

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  Figure 6. Helicity isosurfaces for the reference, baseline ridge design, and optimised design of the current work.

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  Figure 7. Wall shear stress derived metrics of TAWSS, OSI, and RRT for the reference, baseline ridge design, and optimised design of the current work.