Rob
Ansys Employee

The Low Re correction is in 4.4.1.3.1 of the 2019R2 Theory Guide. And this covers what it does, and states the alpha value for high Re flow. If we don't explain further it may be covered in the references to the k-w model: it's not something I have any additional information on, so your next step is the k-w reference(s) that will be in the Theory Guide.