Applications of FSI for Cardiovascular Haemodynamics - Computational Hemodynamics: Theory, Modelling and Applications - page 294

Fig. 8.61 Models of aortic
dissection: ( a ) vessel wall;
( b ) blood flow domain; ( c )
dissection wall. The distal
exit of dissection is open ( not
shown ) or closed/broken ( b )
for the trough lumen model
and blind lumen model,
respectively. (Image from
Qiao et. al. 2014)

8.7.2 Flow Patterns and Wall Deformation in Coronary

Bypass Graft

Figure 8.63 illustrates the mesh displacement contour plot of the sequential anas-
tomosis model at the peak pressure ( t/T = 0.43). The same trend of wall deforma-
tion occurs throughout the cardiac cycle. The maximum mesh displacement of ap-
proximately 0.5 mm exists at the suture line edge of the side-to-side anastomosis. At
the end-to-side anastomosis, maximum displacement occurs on its suture line edge
nearer to the heel in comparison to the toe. These findings may be used to analyse
the effectiveness of suturing at the anastomosis.

Fig. 8.62 Models of blood flow domain after bypassing. ( a ) Through lumen model bypassing
between ascending aorta and abdominal aorta; ( b ) through lumen model bypassing between left
subclavian artery and abdominal aorta; ( c ) blind lumen model bypassing between ascending aorta
and abdominal aorta; ( d ) blind lumen model bypassing between left subclavian artery and abdomi-
nal aorta. (Image from Qiao et. al. 2014)