| INTERPARTICLE FORCES IN HIGH TEMPERATURE FLUIDIZATION OF GELDART A PARTICLES |
| |
| 作者姓名： | HepingCui JamalChaouki |
| |
| 作者单位： | BioproResearchCentre,DepartmentofChemicalEngineering,EcolePolytechniquedeMontreal,C.P.6079,succ.Centre-ville,Montreal,Quebec,CanadaH3C3A7 |
| |
| 摘 要： | Previous reports and current studies show that fluidization of some Geldart A particles is enhanced by in-creasing bed temperature.Both the averaged local particle concentration and the particle concentration in the dense phase decrease with increasing bed temperature,at constant superficial gas velocities.However,conventional models fail to predict these changes,because the role of interparticle forces is usually neglected at different bed temperatures.Here.the temperature increases,the interparticle attractive forces decrease while the interparticle repulsive forces increase.Consequently.fluidization behaviors of some Geldart A particles seem to increasingly shift from typical Geldart A towards B with increasing temperature.
|
| 关 键 词： | 气体-固体流结构 高温物理 流体化作用 颗粒间力 |
INTERPARTICLE FORCES IN HIGH TEMPERATURE FLUIDIZATION OF GELDART A PARTICLES |
| |
| HepingCui JamalChaouki.INTERPARTICLE FORCES IN HIGH TEMPERATURE FLUIDIZATION OF GELDART A PARTICLES[J].China Particuology,2004,2(3):113-118. |
| |
| Authors: | Heping Cui and Jamal Chaouki Biopro Research Centre |
| |
| Institution: | Heping Cui and Jamal Chaouki* Biopro Research Centre,Department of Chemical Engineering,Ecole Polytechnique de Montreal,C.P.6079,succ.Centre-ville,Montreal,Quebec,Canada H3C 3A7 |
| |
| Abstract: | Previous reports and current studies show that fluidization of some Geldart A particles is enhanced by in-creasing bed temperature. Both the averaged local particle concentration and the particle concentration in the dense phase decrease with increasing bed temperature, at constant superficial gas velocities. However, conventional models fail to predict these changes, because the role of interparticle forces is usually neglected at different bed temperatures. Here, the interparticle forces are analyzed to explore the mechanism of gas-solid fluidization at high temperatures. In-deed, as the temperature increases, the interparticle attractive forces decrease while the interparticle repulsive forces increase. Consequently, fluidization behaviors of some Geldart A particles seem to increasingly shift from typical Geldart A towards B with increasing temperature. |
| |
| Keywords: | fluidization gas-solid flow structure high temperature interparticle forces |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
