Abstract
We carry out an experiment for the simultaneous visualization of flowing polymer lumps, coherent structure and near wall temperature fluctuation in turbulent water duct flow by using the fluorescence color particles, the hydrogen bubbles and planer laser-induced fluorescence (PLIF) technique, respectively. The images of the color particles, the bubbles and the fluorescence dye have been captured by two video cameras. It is found that the polymer lumps attenuate the turbulent heat transfer associated with the outward motion of warm fluid due to the quasi-streamwise vortices.
