A multiscale mass transfer model for gas-solid riser flows: Part 1 - Sub-grid model and simple tests
作者： Weigang Dong , Wei Wang , Jinghai Li
DOI: 10.1016/J.CES.2008.01.038
关键词: Thermodynamics 、 Sherwood number 、 Mass transfer 、 Grid 、 Mechanics 、 Fluidization 、 Fluidized bed combustion 、 Computational fluid dynamics 、 Reynolds number 、 Computation 、 Chemistry
摘要: The gas-solid mass transfer in circulating fluidized bed (CFB) riser flow is both structure-dependent and dynamic nature. Recent progress multiscale computational fluid dynamics (CFD) allows fresh insight into the structure, yet its influence on remains to be settled. To this end, a model established paper based extended framework of energy-minimization (EMMS) model. relevant algorithm named EMMS/mass proposed for CFD-coupled computation. Two testing cases accounting sublimation naphthalene decomposition ozone, respectively, are presented demonstrate characters It shown that structural consideration can have significant effects prediction. normally used Reynolds number not adequate characterize these effects, while combination gas velocity solids flux seems capture explain variation Sherwood reported CFB risers literature. Sub-grid coupling CFD approach expected provide promising tool probe nature risers. (C) 2008 Elsevier Ltd. All rights reserved.
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elsevier.com参考文章(51)
W. E. Ranz, Evaporation from drops : Part II Chemical Engineering Progress. ,vol. 48, pp. 173- 180 ,(1952)
Jinghai Li, Yuanki Tung, Mooson Kwauk, Axial Voidage Profiles of Fast Fluidized Beds in Different Operating Regions Circulating Fluidized Bed Technology#R##N#Proceedings of the Second International Conference on Circulating Fluidized Beds, Compiégne, France, 14–18 March 1988. pp. 193- 203 ,(1988) , 10.1016/B978-0-08-036225-0.50022-8
Lynn F. Gladden, Michael D. Mantle, Andrew J. Sederman, Quantifying Physics and Chemistry at Multiple Length-scales using Magnetic Resonance Techniques Advances in Chemical Engineering. ,vol. 30, pp. 63- 135 ,(2005) , 10.1016/S0065-2377(05)30002-0
Anthony G. Dixon, Michiel Nijemeisland, E. Hugh Stitt, Packed Tubular Reactor Modeling and Catalyst Design using Computational Fluid Dynamics Advances in Chemical Engineering. ,vol. 31, pp. 307- 389 ,(2006) , 10.1016/S0065-2377(06)31005-8
Godfrey Vaughan Jeffreys, Victor George Jenson, Mathematical Methods in Chemical Engineering ,(1963)
R.D. La Nauze, K. Jung, J. Kastl, Mass transfer to large particles in fluidised beds of smaller particles Chemical Engineering Science. ,vol. 39, pp. 1623- 1633 ,(1984) , 10.1016/0009-2509(84)80089-5
Gang Guo, Karsten E Thompson, Experimental analysis of local mass transfer in packed beds Chemical Engineering Science. ,vol. 56, pp. 121- 132 ,(2001) , 10.1016/S0009-2509(00)00413-9
D.J. Gunn, Transfer of heat or mass to particles in fixed and fluidised beds International Journal of Heat and Mass Transfer. ,vol. 21, pp. 467- 476 ,(1978) , 10.1016/0017-9310(78)90080-7
Thomas H. Hsiung, George Thodos, Transitional mass-transfer behavior from packed-bed conditions to onset of fluidization International Journal of Heat and Mass Transfer. ,vol. 22, pp. 1003- 1008 ,(1979) , 10.1016/0017-9310(79)90173-X
HT Bi, JR Grace, JX Zhu, None, Types of choking in vertical pneumatic systems International Journal of Multiphase Flow. ,vol. 19, pp. 1077- 1092 ,(1993) , 10.1016/0301-9322(93)90079-A