Abstract
The spatio-temporal velocity field on the heated rotating disk is measured using ultrasound Doppler velocimetry, respect to the Grashof number and rotating Reynolds number. The measurement component is radial one including a centrifugal force and normal direction one including a buoyancy force. Using the result of velocity field, the analysis is carried out by the correlation of the velocity fluctuation and stochastic method. As a result, the classification between the forced and natural convection in indicated by a unsteady structure. The difference of the traveling velocity of the vortex is clarified by the result of the correlation and conditional average.
