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Dynamic Simulation of Volume Fraction and Density Solid Phase Effect on Phase Hold-Up in 3 Phase Fluidize Bed Column through CFD

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http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53423#.VMG_zCzQrzE

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ABSTRACT
The gas-liquid-solid fluidized bed has emerged in recent years as one of the most promising devices for three-phase operation. Selection and design is one of them in parameter in the performance of three phase system. This paper focuses on volume fraction and density effect on the phases hold-up in a 3 phase fluidize bed column containing liquid phase with 100 cm height and 20 cm diameter, in this case the solid phase with 0.15, 0.25, 0.35 volume fraction and density 2470, 3000, 4000, 5000 m3 dispersion into liquid phase and the gas phase enter the column through a sparger of 2 cm diameter with 0.02 m/s velocities. The results show as the solid phase volume fraction increases from 0.02 to 0.08 m/s. The gas hold-up decreases and solid hold-up increases. Solid phase density increases, so solid phase hold-up decreases and gas hold-up decreases.
 
Cite this paper
Salehi, M. and Basiry, A. (2015) Dynamic Simulation of Volume Fraction and Density Solid Phase Effect on Phase Hold-Up in 3 Phase Fluidize Bed Column through CFD. Engineering, 7, 31-35. doi: 10.4236/eng.2015.71003.
 
References
[1]Panneerselvam, R., Savithri, S. and Surender G.D. (2009) CFD Simulation of Hydrodynamics of Gas-Liquid-Solid Fluidized Bed Reactor. Chemical Engineering Science, 64, 1119-1135.
 
[2]Bahary, M. (1994) Experimental and Computational Studies of Hydrodynamics in Three Phase and Two Phase Fluidized Bed. Ph.D. Thesis, Illinois Institute of Technology, Chicago.
 
[3]Pain, C., Mansourzadeh, C. and Oliveira, S. (2001) A Study of Bubbling and Slugging Fluidized Beds Using Two Flow Granular Temperature Model. International Journal Multiphase Flow, 27, 527-551.
http://dx.doi.org/10.1016/S0301-9322(00)00035-5
 
[4]Schallenberg, J., Enb, J. and Hempel, D. (2005) The Important Role of Local Dispersed Phase Hold-Ups for the Calculation of Three Phase Bubble Columns. Chemical Engineering Science, 60, 6027-6037.
http://dx.doi.org/10.1016/j.ces.2005.02.017
 
[5]Savithri, S. and Surender, G.D. (2009) CFD Simulation of Hydrodynamics of Gas-Liquid Reactor. Chemical Engineering Journal, 31, 1024-1032.
 
[6]Kunii, D. and Levenspiel, O. (1991) Fluidization Engineering. 2nd Edition, Butterwo, Washington DC.
 
[7]Howard, J. (1989) Fluidized Bed Technology. Principles and Applications. Adam Higler, New York.
 
[8]Park, H. (2009) CFD Advantages and Practical Applications. Glumac Inc., Portland.
 
[9]Trambouze, P. and Uzen, J. (2004) Chemical Reactors, From Design to Operation. Technip, Paris.
 
[10]Muroyama, K. and Fan, L. (1985) Fundamentals of Gas-Liquid-Solid Fluidization. AIChE Journal, 31, 1-34.
 
[11]Epstein, N. (1981) Three-Phase Fluidization. The Canadian Journal of Chemical Engineering, 59, 649-757.
http://dx.doi.org/10.1002/cjce.5450590601
 
[12]Dudukovic, M.P., Larachi, M.P. and Mills, F. (1999) Multiphase Reactors-Revisited. Chemical Engineering Science, 54, 1975-1995.
http://dx.doi.org/10.1016/S0009-2509(98)00367-4
 
[13]Patankar, S.K. Numerical Heat Transfer and Flow. McGraw-Hill, Washington DC, New York.      eww150123lx

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