: I was going to surmise that the modeling had flow mostly along the chines and very little across the chines. The flow crossing the chines would be at a very low angle of divergance. So one would not expect much difference.

: A difference might show up in flow across the chines, bracing and rolling. But even there makeing boats "similar" is not easy.

The flow varies and forward it dives under the boat and ropughly follows the buttock lines. It is rarely clear what happens nearer the surface and this is where CFD gives us insight by determining what that flow might be.

Of course, the more oblique the flow to the chine or hull discontinuity the greater the effect. It wa soften argued that teh clinker built Folkboats were faster than the carvel built Folkboats because the clinker construction followed the flow lines better. Alas this was not the case and the perceived advantage was illusory.

In the case of the study in question we found that there wasn't much difference but difference results might occur if the chine configuration were different. This is something I hope to study in more detail at some later date.