[CFD] What is the difference between y+ and y*?

A concise explanation of the difference between the dimensionless wall distances y and y*. These metrics are used by all mainstream CFD codes (OpenFOAM, CFX, FLUENT, Star, Saturne, COMSOL). The following topics are covered: 1) 7:36 What is the difference between y and y*? 2) 10:22 Is it better to use y and y*? 3) 17:54 Which CFD codes y and which CFD codes use y*? #yPlus #fluidmechanics101 #cfd ========================================== Some useful references: ========================================== 1) ANSYS FLUENT User Manual Standard Wall Functions 2) J. Bredberg, On the Wall Boundary Condition for Turbulence Models, Internal Report 00/4, Chalmers University of Technology, Goteborg, Sweden, 2000. ~lada/postscript_files/ 3) R. Moser, J. Kim and N. Mansour. Direct numerical simulation of turbulent channel fl