Influence of secondary flow generated in a 90-deg bend on the thermal-hydraulic characteristics in a mixing tee

Yuki, Kazuhisa*; Sugawara, Yoshimasa*; Hosseini, S. M.*; Hashizume, Hidetoshi*; Toda, Saburo*; Tanaka, Masaaki  ; Muramatsu, Toshiharu

This study aims at clarifying a relationship between non-isothermal fluid mixing in a T-junction area with 90-deg bend upstream and temperature fluctuations induced by the unstable mixing, by visualizing the flow fields with particle image velocimetry and measuring fluid-temperature fluctuation in the vicinity of a wall. By the experiment, flow-pattern of the jet flowing out from a branch pipe and characteristics of temperature fluctuation in mixing area were clarified in relation to the secondary flow generated in the 90-deg bend.