Note: "README.WP1" file contains the same information presented
in this file in WordPerfect 5.1 format.

     This document explains the layout of the data
included in this diskette. The data are presented in the
Journal of Fluid Mechanics paper titled "An
Experimental Study of a three-dimensional
Pressure-driven Turbulent Boundary Layer" by Semih M.
™l‡men, and Roger L. Simpson, 1995, vol 290, pp. 252-262.
     The data consist of mean velocity, and all six
components of the stress tensor presented in several
coordinate systems measured at 7 stations in a
3-dimensional pressure-driven turbulent boundary layer
of a wing-body junction flow.
     Different station data are located in separate
directories. The directories ST1 through ST7 include data
of stations 1 through 7 respectively. In each directory
there are 2 sub-directories named "WC" and"FS". "WC"
sub-directory contains the data presented in wall-stress
coordinates. "FS" sub-directory contains the data
presented in local-free-stream coordinates. In each of
these sub-directories there are 2 more sub-directories
named "YPLUS" and "BLT". "YPLUS" sub-sub-directory
contains the data with y distance away from the wall is
given as nondimensional wall units (y+=y*utau/nu). "BLT"
sub-sub-directory contains the data with y distance
nondimensionalized with the boundary layer thickness.
However the data in the main directories are
dimensional.
     In each directory, sub directory and sub-sub
directory the file names are named according to the
following convention:

     ST {first #} {second #} . {extension}

     ST, is the abbreviation for station,
     {first #} shows the station number
     {second #}, can have two different values, "1" or
"der". Files with {second #}=1 contain the mean velocity
data and stress components. File with {second #}=der
contain the derived information from the data.
     {extension}, shows the coordinate system the data
is presented in or the nondimensionalizing velocity used
for the mean velocity and velocity products. Files with
{extension}={WC} contain the data presented in the
wall-stress coordinates. {extension}={FS} files contain the
data presented in the local-free-stream coordinates.
{extension}={TC} files contain the data presented in the
tunnel coordinates. The data in files with extension
"WC","FS", "TC", are dimensional. The velocity and
stress data in these files have the dimensions of (m/sec)
or powers of it, and the y distance has a dimension of
(m). Data files with {extension}={UT} contain the data
which are nondimensionalized with the skin-friction
velocity. {extension}={UR} files contain the data
nondimensionalized with the reference velocity
(nominally 27.5 m/sec).
     The data in the files with {second #}=1 are in the
following order:

     y, U, V, W, u2, v2, w2, uv, uw, vw

     The data in files with {second #}=der are in the
following order:

     y, N, A, Flow angle, Flow gradient angle, Shear
stress angle

     in which N stands for the anisotropy constant,

     A=Townsend's structural parameter
      =shear stress magnitude / ( 2* turbulent kinetic energy)
     Flow angle =arctan (W / U)
     Flow gradient angle = arctan((partial W/partial y)/(partial U/partial y))
     Shear stress angle =arctan(vw/uv)
     The derived quantities are given only in
local-free-stream and wall-stress coordinates.