  This paper describes an experimental investigation, by means of hot-wire
anemometry, of the characteristics of velocity and temperature in a rotating
turbulent boundary layer under isothermal and non-isothermal conditions. The
ranges of experimental parameters are: Reynolds number from 10000 to 25000,
rotational speed from 0 to 150 rpm, and y+ from 1.8 to 100. The relative
temperature difference is held constant at 0.1. Detailed velocity and
temperature distributions in the boundary layer are measured in the rotating
state, and a new criterion for boundary layer segmentation under rotation is
proposed. The applicability of boundary layer theory under the rotating state
is extended. The influence of Coriolis force and buoyancy on the velocity and
temperature distributions in the turbulent boundary layers are analyzed.
Coriolis force is found to play an important role in the behavior of the
boundary layer under rotation, as it shifts the velocity and temperature
boundary layers. Under isothermal conditions, such effects can be classified
according to the dominant force: viscous, Coriolis, or inertial. Under
non-isothermal conditions, buoyancy occurs. The buoyancy induced by the
Coriolis force suppresses the effect of the Coriolis force, and the suppression
effect increases with temperature difference. The variation of turbulent
Prandtl number Prt under rotation is also obtained.
