Enhanced particle mixing performance of liquid-solid reactor under non-periodic chaotic stirring

Abstract

This paper introduces the Chebyshev non-periodic chaotic stirring speed based on chaos theory. Additionally, it constructs the DEM-VOF coupled computational model to investigate non-periodic mixing within the reactor system. Numerical calculations are employed to compare and analyze Constant Stirring Speed (CSS) with Chebyshev Non-Periodic Chaotic Stirring Speed and its reverse (CRS, CRS-R). The results indicate that the number of particles deposited at the bottom of end diffusion decreases by 54.3 %. Moreover, it samples particle concentration per unit volume, resulting in a 70.3 % decrease in the Relative Concentration Standard Deviation (RCSD) of particles. Furthermore, it quantifies the mixing effect based on the distribution of distances between particles, leading to a 20.3 % increase in the Unit Block Mixing Index (UBMI). In conclusion, this study improves particle distribution characteristics by utilizing appropriate non-periodic variable speed intervals. Additionally, it provides technical support for production scenarios involving the mixing and dispersion of multiphase non-homogeneous systems.