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Developing Heterogeneous Drag Model for Fluidization Process and Its Generalization
Pages: 785-790
Year: Issue:  4
Journal: Journal of Engineering Thermophysics

Keyword:  heterogeneous gas-solid two-phase flowclusterdrag modelgeneralization;
Abstract: Drag model play an important role in the simulation fluidization process.The existing heterogeneous drag model cannot apply in various operating conditions well.Based on the Energy Minimization Multi-scale theory(EMMS),a new heterogeneous drag model—QC-EMMS model was proposed through deeply recognizing the characteristics of meso-scale structure.A heterogeneity factor,Ψ,was introduced to represent the cluster density varying with conditions.The overall slip velocity Reynold’s number,Re~*,was used to represent the macroscopic overall heterogeneity.The QC-EMMS model was generalized through relating Ψ with Re~*.Experimental verification show that QC-EMMS model has a high simulation accuracy and good mesh independence.
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