@DaleKramer, while OpenFOAM is fairly robust at handling a multitude of Y+ values you should still try to match your Y+ to both the turbulence model you are using and the problem you are solving. SimScale offers the two most widely used turbulence models in OpenFOAM, κ-ε and κ-ω Menter SST.
κ-ε: Generally valid for values of 30<Y+<300; the Realizable κ-ε model is valid for Y+<10 as well but I’m not sure SimScale has implemented that one. The traditional model was designed for internal flows such as pipes, flows that have a positive pressure gradient, and free flows such as a jet into a quiescent fluid. This model will generally not perform well in flows that require accurate determination of separation such as external aerodynamics.
κ-ω SST: This model is designed to perform very well for flows with Y+<1 but can handle a Y+<5~10 depending on the resolution required. This model reverts to the κ-ε formulation in areas of Y+>~50 and in the freestream. This makes it ideal and the preferred method for external aerodynamics and other cases where capturing flow separation is extremely important.
I hope this kind of helps and I’m always willing to expand more on the topic if you are interested.