Figure 5.

Results from physiological wall motion and inlet velocities obtained from in situ experiments. a) Vessel radius (line) and inlet axial velocity (dotted line) values (0.028 < v_inlet < 1.28 mm/s) applied as boundary conditions, b) Average axial velocity in contracting segment at the center (asterisks) and upstream locations (dots) compared to in situ velocity (square) values, c) Average axial wall shear stress values from CFD model at the center (asterisks) and upstream (dot) locations, corresponding quasi-static Poiseuille (line) values, and wall shear stress estimated from in situ data (squares) d) Radial to axial velocity ratio. The CFD result deviates from in situ result at times of rapid contraction or expansion. These deviations are due to our estimate of inlet velocity. It appears that the in situ data was taken at a location further upstream of the contracting segment (i.e. closer to the inlet).