RECENT ADVANCES IN THE UNDERSTANDING OF MICROMIXING PHENOMENA IN STIRRED REACTORS

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Abstract
Micromixing is shown to proceed via three main mechanisms relying on the concept of “fluid aggregates”: (I) Laminar stretching (2) Turbulent erosion (3) Molecular diffusion, each with a characteristic time constant. Experiments are reported where chemical reactions are controlled by one or several of these processes. It is found that the ratio of the microfluid/macrofluid volumes is roughly equal to that of the reaction/ micromixing times. Tentative correlations are proposed to estimate the erosion and diffusion times and to calculate conversion and yield in micromixing controlled regime

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