抄録
In this paper, we report an experimental technique for simultaneous measurement of temperature and three-components of velocity in three-dimensional thermal flow using scanning liquid-crystal thermometry and stereoscopic PIV. The three-dimensional measurement is carried out by scanning the light-sheet plane while capturing the sequential color images of liquid crystals and tracer particles. The present experimental technique is applied to the turbulent convection and the three-dimensional structures of thermal plumes are studied. The experimental results indicate that the structures of plumes are sometimes correlated with the vertical velocity of the fluid, but they behave randomly in space influenced by the large-scale turbulence.
