EXPERIMENTAL STUDIES OF DIFFERENTIAL HEATING FOR ARTIFICIAL UPWELLING

Ming Lv, Xu Yan, Xin Nie, Huachen Pan, Haiqiang Liu

School of Mechanical Engineering, Hangzhou Dianzi University, 310018, Hangzhou, China

PIV experiments were carried out to study the mechanism and characteristics of a new artificial upwelling technology via differential heating named “Differential- Heating-Liquid-Upwelling” (DHLU). Results show that there is a small scaled area with high temperature around the modelling heat point source in DHLU system. The existence of this high temperature area is suggested as the power source of upwelling. Obvious upwelling flows upon the heating source were observed in DHLU system. The stream tube of upwelling for DHLU system is just like an upside-down cone. The max ascending velocity of horizontal layer increases firstly and decreases then as the height increases. A few of fluid masses with high ascend velocities were observed and the mechanism of the DHLU is revealed.