Investigation on Ice Melting by Simultaneous Thermometry and Velocimetry Method in Oil*

Crude oil is accidentally released into open water each year. Since the released oil is harmful to the environment, the trajectory needs to be predicted in order to remove the oil minimizing the polluted area by oil. The prediction of the spilled oil trajectory becomes complicated when the ice is present like in Arctic Ocean. When the oil is adjacent to ice, the oil causes the ice melting. In order to simulate this ice melting, the heat transfer between oil and ice needs to be understood. Spatial- and time-resolved temperature and velocity change in oil are required. Several optical measurement techniques can provide spatial- and time-resolved information in fluids, however, none of those techniques are available to measure the temperature and velocity distribution in oil simultaneously. In this research, the simultaneous thermometry and velocimetry in oil is accomplished by combining Dual Luminescence Imaging (DLI) for thermometry and Particle Image Velocimetry (PIV). Pyranine-induced particles are used for PIV. By selecting proper luminophores for DLI, temperature and velocity distributions in oil can be captured by a color camera in the developed method. With this technique, the ice melting is studied and will be discussed in the presentation.