README.DOCumentation file Data for cube at Re 80000 DATA AQUIRED FOR THE DOCTORAL THESIS (1992) Data in the files is normalized according to: x --- U direction (main flow direction) x=0 leading cube edge y --- V direction (height) y=0 channel floor (foot of cube) z ---- W direction (span or width) z=0 middle or symmetry plane ( middle of cube ) H = cube height (25.0mm) Ub = bulk velocity h = channel height = 2H = 50.0mm x,y,z ===> x/H, y/H, z/H U, V, W =====> U/Ub, V/Ub, W/Ub Reynolds stresses are normalized by Ub^2 Third order velocity correlation coefficients: ____ ____ ____ ____ u3 = u^3 u2v = u^2v uv2 = uv^2 v3 = v^3 ----- ----- ----- ----- u~^3 u~^2v~ u~v~^2 v~^3 ____ ____ ____ ____ u3 = u^3 u2w = u^2w uw2 = uw^2 w3 = w^3 ----- ----- ----- ----- u~^3 u~^2w~ u~w~^2 w~^3 Fourth order velocity correlation coefficients: ____ ____ ______ ____ ____ u4 = u^4 u3v = u^3v u2v2 = u^2v^2 uv3 = uv^3 v4 = v^4 ------ ------ ------- ------- ----- u~^4 u~^3v~ u~2v~^2 u~v~^3 v~4 ____ ____ ______ ____ ____ u4 = u^4 u3w = u^3w u2w2 = u^2w^2 uw3 = uw^3 w4 = w^4 ------ ------ ------- ------- ----- u~^4 u~^3w~ u~2w~^2 u~w~^3 w~4 where u~= sqrt(u^2), v~=sqrt(v^2), w~=sqrt(w^2), i.e. rms velocity fluctuations Data files are contained in 4 directories: data_a : files contain mean velocity and Reynolds stresses from u-v measurements data_b : files contain third and fourth order moments from u-v measurements data_c : files contain mean velocity and Reynolds stresses from u-w measurements data_d : files contain third and fourth order moments from u-w measurements Within each directory, files are named as xnnzmm_l.dat where l denotes the directory (and hence what type of data it aontains), nn denotes the x location, and mm the z location of the profile. The values of nn and mm correspond to x/H and z/H positions as given below. x-name(nn) x-position z-name(mm) z-position ------------------------------------------------ 01 -18.02 01 -6.00 02 -14.10 02 -1.50 03 -11.44 03 -1.00 04 -10.80 04 -0.76 05 -7.00 05 -0.74 06 -6.90 06 -0.54 07 -5.00 07 -0.50 08 -4.00 08 -0.25 09 -3.00 09 0.00 10 -2.00 10 0.25 11 -1.50 11 0.50 12 -1.00 12 1.00 13 -0.75 13 1.20 14 -0.50 14 1.60 15 -0.44 15 3.20 16 -0.42 16 6.00 17 -0.33 18 -0.32 19 -0.25 20 -0.02 21 0.00 22 0.25 23 0.50 24 0.75 25 1.00 26 1.08 27 1.25 28 1.33 29 1.50 30 1.56 31 2.00 32 2.33 33 2.41 34 2.50 35 3.00 36 4.00 37 6.00 38 8.00 For example, x18z12_a.dat contains u-v measurement data of mean velocities and Reynolds stresses at x/H=-0.32, z/H=1.0. The locations are also given in the header lines of each file.