Hello, on this y+ calculator, can anyone explain to me what the Estimated wall distance represents and what the Boundary layer length represents? And does anyone know any great example projects that have good y+ values?
thank you for your help,
Frank Lucci
This post should work for your first question.
A good y+ value is such that stays within the y+ ranges for your turbulence model (if you are using wall functions). This has been already answered in other post of the SimScale forum.
Best regards,
J.A. Gutiérrez
Adding to @jairogut
A brief description of y+ can be found in this article.
At SimScale for the most time, we use k-w-SST as the wall turbulence model. Therefore choosing a Y+ between 30< y+ <300.
I would say that any project that has the appropriate Y+ values for the flow situation can be considered as a good example 
Best regards Sebastian