A study of turbulent diffusion and chemical reaction of two-species in liquids

这项研究已经开始阐明湍流混合过程对液体化学反应的影响。从半导体器件、薄膜、微粒和生物技术的生产过程来看，这一现象的重要性是显而易见的。对于理解湍流与化学反应之间的关系也具有深远的意义。为了进行这样的研究，必须建立一套能够在一个时间点上实时测量反应物和产物中各组分的浓度的测量系统。利用光纤和衍射光栅，可以分离出三种染料溶液的浓度。分离的光在410 nm、520 nm和650 nm处呈现线状光谱，带宽为15 nm，每束光分别检测到不同的光电倍增倍数，校正结果符合朗伯-比尔定律。将两种染料的混合溶液从直径为1.05 mm的喷嘴喷射到静水中，形成湍流射流。测得各染料溶液的平均浓度和波动浓度值与单染料溶液喷射值吻合较好。认为分子扩散效应是明显的。

This study has started to clarify the effects of turbulent mixing process on the chemical reaction in liquids. The importance of the phenomenon is evident from the view point of the production processes of semiconductor devices, thin film, micro- particles and biotechnology. Also it has deep significance for understanding the relationship between turbulence and chemical reactions. In order to perform such a research it is indispensable to construct a measuring system which can measure concentration of each component of the reactants and products at one point instantaneously. Using optical fibre and a diffraction grating it could be separated concentrations of three species of dye solutions. Separated lights showed line spectrum at 410 nm, 520 nm and 650 nm and band width was 15 nm and each light was detected respective photomultiplier.The calibration showed excellent agreement to the Lambert-Beer's law. The mixed solution of two-kinds of dye was ejected from a nozzle having 1.05 mm in diameter into the still water developing a turbulent jet. The measured mean concentration and fluctuating concentration values of respective dye solution showed good agreement to the values of monodye solution jet. It was considered that molecular diffusion effect is appreciable.