AN EMMS BASED MIXTURE MODEL FOR TURBULENT FLUIDIZATION
Turbulent fluidization has only been widely recognized as a distinct flow regime for the past two decades, even though it is commonly utilized in industrial fluidized-bed reactors.Relatively fewer efforts have been made to model these systems as compared to bubbling and circulting fluidized beds.In current work, we have reformulated the original EMMS model in terms of a mixture.This mixture comprises of gas and particles at micro-scale and voids and suspension phase at meso-scale.Subsequently, all properties are calculated in terms of mixture rather than individual phases.With the minimization of the objective function, the system is then solved numerically.The objective function, used to close the system of equations, is made of the energy consumption rates needed to suspend gas-particle suspension and the energy consumed due to interaction between suspension and voids.The model is then applied to simulate gas-solid turbulent fluidized bed.Results of simulations are found in good agreement with experimental data by prediction of a dense bottom and dilute top zone.A comparison of results with homogeneous drag model is also presented.
Atta Ullah Wei Wang Jinghai Li
Department of Chemical Engineering,Pakistan Institute of Engineering & Applied Sciences (PLEAS),Isla Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chin Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China
国际会议
The 11th International Conference on Fluidized Bed Technology(CFB-11)(第十一届流化床技术国际会议)
北京
英文
267-272
2014-05-14（万方平台首次上网日期，不代表论文的发表时间）