TITLE:
Quantitative Evaluation of Mixing Characteristics of Static Mixers by Visualization Experiments
AUTHORS:
Noboru Mochizuki, Aya Kaide, Takashi Saeki
KEYWORDS:
Line Mixer, Stacked Elements, Pigment, Mixing Performance, Visualization Experiment
JOURNAL NAME:
Journal of Flow Control, Measurement & Visualization,
Vol.6 No.1,
January
3,
2018
ABSTRACT: We propose a convenient way of evaluating the mixing performance of static mixers used for round pipe by conducting flow visualization experiments under the turbulent region and using water as the main stream. A fluorescent pigment, glycerin, two carboxymethyl cellulose solutions, and rapeseed oil were each injected upstream of the mixer. Three static mixer conditions were tested: 1) no static mixer; 2) a Kenics-type static mixer; and 3) a multi-stacked elements (MSE) static mixer. The mixing trend downstream of the mixer in each condition and with each injection fluid was monitored using a laser and high-speed video camera system to obtain cross-sectional images. We propose suitable indexes based on the images obtained for quantitative evaluations of the mixing characteristics of static mixers.