This is an old conversation but it’s still very relevant. Thanks for sharing that paper, @ArisVartholomaios .
I also wanted to add that any parameter that was found to greatly affect the sensitivity of the UWG results in the study done by Aiko Nanoko that @SaeranVasanthakumar linked to earlier in this thread is now a required input in the version of Dragonfly we released a few months ago. Boundary layer parameters are not required for the reasons @SaeranVasanthakumar listed. Still, any further info that can be provided on recommended boundary layer parameters is always helpful.