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. 3) R. Moser, J. Kim and N. Mansour. Direct numerical simulation of turbulent channel fl