Patient-Specific Simulation of Coronary Artery Pressure Measurements: An In Vivo Three-Dimensional Validation Study in Humans

Table 4

Results of the mesh sensitivity analysis in the lumen (rigid wall assumption).

Face size	Lumen mesh size (elements)	Outlet pressure (mm Hg)	Difference in pressure (%)	Cross-sectional WSS (Pa)	Difference in WSS (%)
0.13–0.15 mm	87 K	105.516	0.053	6.31	21.22
0.12–0.15 mm	176 K	105.512	0.049	7.14	10.86
0.09–0.12 mm	400 K	105.483	0.022	7.78	2.87
0.07–0.09 mm	657 K	105.460	—	8.01	—

WSS: wall shear stress.
The selected mesh size for the final simulations is indicated in bold font (<5% difference in WSS).