文献类型：期刊文献

英文题名：Flow reorganization in cohesive granular materials induced by pulsed aeration

作者：Lu, Haifeng[1];Zhang, Liang[1];Guo, Xiaolei[1];Liu, Haifeng[1,2]

机构：[1]East China Univ Sci & Technol, Natl Energy Coal Gasificat Technol Res & Dev Ctr, State Key Lab Coal Liquificat Gasificat & Utilizat, Shanghai 200237, Peoples R China;[2]Liaoning Petrochem Univ, Fushun, Liaoning, Peoples R China

年份：2026

卷号：72

期号：1

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20254319376684);WOS:【SCI-EXPANDED(收录号:WOS:001594132800001)】；

基金：National Natural Science Foundation of China, Grant/Award Number: 51876066; Shanghai Engineering Research Center of Coal Gasification, Grant/Award Number: 18DZ2283900

语种：英文

外文关键词：Froude number; hopper discharge; powder rheology; pulsed aeration

摘要：Pulsed aeration offers a solution to the flow regulation challenges of cohesive granular materials in industrial processing. We experimentally studied the hopper discharge and rheological characteristics of cohesive lactose powders under pulsed aeration. Experimental results demonstrate that pulsed aeration significantly improves discharge efficiency compared to continuous aeration. Rheological tests demonstrate that pulsed aeration reduces interparticle cohesive forces by 90% through enhanced shear, exceeding the limit achievable under continuous aeration. By defining the pulse-induced dimensionless acceleration parameter, the coherent relationship between the discharge rate and energy dissipation was established, which reveals that the shear engendered by pulsed aeration triggers the reorganization of the flow regime and the reconstruction of energy dissipation pathways after reaching fluidization, driving the granular system toward a minimum energy structure. A Weibull model based on the pulsed Froude number describes the nonlinear evolution of flow rate, identifying the localized flow reorganization within the cohesive powder.