CFD Simulation of Pre-Polymer Pneumatic Conveying and Calculation of their Saltation Velocity

Document Type : Research Article

Authors

Computational Fluid Dynamics Research Laboratory, Faculty of Chemical Engineering, Iran University of Science and Technology, Tehran,I.R. IRAN

Abstract

In the present study saltation velocity of particles during pneumatic conveying was calculated by Computational Fluid Dynamic (CFD). The Lagrangian approach was used for particle motion. The optimum condition in pneumatic conveying is achieved by minimum energy loss. The gas and particle motion equations were solved using a finite volume discretisation and Runge-Kutta schemes respectively. The results of CFD simulations and experimental correlation for uniform particles are in good agreement (average error 17.6%). In order to study the effect of Particle Size Distribution (PSD) on saltation velocity the real PSD of injected pre- polymer into gas phase polymerization reactor was used.

Keywords

Main Subjects

References

[1] Ullman, “Encyclopedia of Industrial Chemistry”, 33, p. 482 (1996).
[2] Liang S.F., Chao Z., “Principle of Gas- Solid Flow”, CambridgeUniversity Press, (1998).
[3] Fokeer S., Kingman S., Lowndes I., Reynolds A., Characterization of the Cross Sectional Particle Concentration Distribution in Horizontal Dilute Flow Conveying a Review, Chem. Eng. Process., 43, p.677 (2004).
[4] Ranade, V., “Computational Flow Modeling for Chemical Reactor Engineering”, Academic Press (2002).
[5] Huber N., Summerfield M., Modeling and Numerical Calculation of Dilute Phase Pneumatic Conveying in Pipe Systems, Powder Technol., 99, p. 90 (1998).
[6] Bilirgen H., Levy E., Mixing and Dispersion of Ropes in Lean Phase Pneumatic Conveying, Powder Technol., 119, p. 37 (2001).
[7] Bilirgen H., Levy E., Prediction of Pneumatic Conveying Flow Phenomena Using Commercial CFD Software, Powder Technol., 95, p. 37(1998).
[8] Tsuji Y., Morikawa Y., Tanaka T., Nakatsukasa N., Nakatani M., Numerical Simulation of Gas-Solid Two-Phase Flow in a Two-Dimensional Horizontal Channel, Int. J. Multiphas Flow, 13, p. 671, ) 1987(.
[9] Sommerfeld M., Modelling of Particle/Wall Collisions in Confined Gas-Particle Flows, Int. J. Multiphas Flow, 18, p. 905 (1992).
[10] Vesilind A., The Rosin-Rammler Particle Size Distribution, Resource Recovery and Conservation, 3, p. 275,(1980).
[11] Launder B.E., Spalding D.B., The Numerical Computation of Turbulent Flow, Comp. Meth. App. Eng., 3, p. 269 (1974).
[12] Sommerfeld M., Analysis of Collision Effect for Turbulent Gas Particle Flow in Horizontal Channel: Part Ι. Particle Transport, Int. J. Multiphas Flow, 29, p. 675(2003).
[13] Patankar S.V., “Numerical Heat Transfer and Fluid Flow”, McGraw-Hill, (1980).
[14] Gerald C.F., “Applied Numerical Analysis”, Addison Wesley Longman, (1999)
[15] Tashiro H., Peng Y., Tomita Y., Numerical Prediction of Saltation Velocity for Gas-Liquid Two-Phase Flow in Horizontal Pipe, Powder Technol., 91, p. 141 (1997).
[16] Bird R.B., Warren E. Stewart, Edwin N. Lightfoot, “Transport Phenomena”, John Wiley& Sons, (2002).

Files

Share

How to cite

Statistics