Measurements in the turbulent momentum and thermal boundary layers on a rot
ating disk with a uniform heat flux surface are described for Reynolds numb
ers up to 10(6). Measurements include mean velocities and temperatures, all
six Reynolds stresses, turbulent temperature fluctuations, and three turbu
lent heat fluxes. The mean velocity profiles have no wake region, but the m
ean temperature profiles do. The turbulent temperature fluctuations have a
large peak in the outer layer, and there is a third turbulent heat flux in
the cross-flow direction. Correlation coefficients and structure parameters
are not constant across the boundary layer as they are in two-dimensional
boundary layers (2DBLs), and their values are lower. The turbulent Prandtl
number agrees with 2DBL values in the lower part of the outer region but is
reduced from the 2DBL values higher in the boundary layer. In the outer re
gion of the boundary layer, the transport processes differ significantly fr
om what is observed in two-dimensional turbulent boundary layers: ejections
dominate the transport of momentum while both ejections and sweeps contrib
ute to the transport of the passive scalar.