Analysis of the data base from a DNS of a separating turbulent boundary layer

This work was performed at CTR during a month-long visit in May 1999. The data base analyzed comes from a simulation performed by Na and Moin (1998). Although the data from the simulations has been used in the study of the structure of the wall pressure Na and Moin (1998), an analysis of the mean flow had not been conducted to a great extent. The aim of this work is to investigate the near wall scalings of the turbulent mean flow close to separation. The scalings are very important for the correct behavior of wall damping functions used in turbulence models. For a zero pressure gradient (ZPG) boundary layer, the damping functions and boundary conditions in the logarithmic layer are based on a theory where the friction velocity,