An Optimal Design of Expansion-contraction Microchannel Based on Blockage Analysis

MicroChannel blockage is a common problem in microreactor applications. The principle of inertial aggregation in microchannel is used to analyze the formation of secondary flow and the wall effect of blockage. A heterogeneous microchannel structure combined with expansion and contraction is designed to achieve separation of blockage and solution. Finally, the designed microchannel is compared with the straight tube microchannel which has the same volume by CFD simulations, and the blockage distribution in the microchannel of the expansion-contraction structure is 340% larger than that of the straight tube structure, and the blockages are effectively collected in a predetermined separation position.