Abstract Summary (Max 250 words)
High quality of the mixing plays a decisive role in rapid reactions, affecting the quality of products. For comparison, the quality of micromixing and the specific energy dissipation rate in microreactors for following geometry and methods of supply were investigated: feeding through two tangential pipes (TU+TU), through two radial pipes (RU+RU), through a tangential and axial pipe (TU+C), and through a radial and axial pipe (RU+C). Furthermore, a special case of feeding solutions simultaneously through three pipes was investigated: two tangential and an axial pipe (TU+TU+C), as well as through two radial and an axial pipe (RU+RU+C). This case corresponds to feeding three solutions into the first chamber, which is used in some types of synthesis of nanosized particles of inorganic materials. Based on the research results, the following conclusions were made: 1) The use of a swirling (feeding into tangential pipes) allows one to achieve higher quality of micromixing than in the absence of a swirling (supply to radial pipes) for all methods of feeding; 2) The primary contact of the reagents in the zone of the neck results in higher quality of micromixing than that for the primary contact of the reagents in the upper chamber zone (i.e. the micromixing in TU+C and TU+TU+C is better than TU+TU, RU+C and RU+RU+C is better than RU+RU method); 3) At high flow rates, the quality of micromixing for the supply in three inlet pipes (TU+TU+C method) MRISF-2 is better than that for the TU+C method.
