화학공학소재연구정보센터
KAGAKU KOGAKU RONBUNSHU, Vol.35, No.4, 357-363, 2009
Mechanism of Advective Mixing in a Non-Elememt Mixer
Cross-sectional visualization of the mixing pattern in a non-element mixer was carried out using laser induced fluorescence (LIF) to evaluate characteristics of a mixer consisting of the main flow pipe and branch flow pipes. The branch flows were injected periodically with the period T(p) normal to the main flow, and rhodamine B was mixed into the most upstream branch flow to visualize mixing pattern in the main flow pipe by LIF. The length of boundary line L of the LIF image, where molecular diffusion takes place, was measured. When the number of branch flows is increased, the mixing pattern became complicated and was supposed to become chaotic. The mean value of length of boundary line (L) over bar increased exponentially with an increase in the number of branch flows, which indicates that L increases nonlinearly in the same way as in a Kenics type static mixer.