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Abstract

Several polymer processing operations such as rotational moulding and powder coating involve avalanching flow of granular materials. The objective of this work is to develop a model and simulate mixing and segregation of granular particles during such flow. The movement of particles has been modelled using the Monte Carlo approach. Important forces such as interparticle friction, adhesion and electrostatic forces have been incorporated in the simulation. Simulation results show segregation in the bed as a result of size differences and are consistent with published results for cohesionless systems. The simulation allows for the quantitative evaluation of the effects of particle characteristics and material properties on the flow behaviour of granular materials during processing, which, otherwise, could not easily be determined experimentally. Results showed that the gradual development of cohesive forces inhibits the movement of particles and can lead to the development of reverse segregation patterns.

Keywords

ROTATIONAL MOULDING MONTE CARLO SIMULATION COHESIVE FORCES MIXING SEGREGATION

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References

Van Hecke

I. M.

: Nature , 2005, 435, 1041–1042.

Throne

J. L.

: Proc. Conf. ANTEC, San Francisco, CA, 2002, Society of Plastics Engineers, Paper 583.

Gupta

R. K.

: ‘Polymer and composite rheology’, 2nd edn; 2000, New York, Marcel Dekker.

Duran

: an introduction to the physics of granular materials'; 2000, New York, Springer-Verlag.

Ristow

G. H.

: ‘Pattern formation in granular materials’; 2000, New York, Springer-Verlag.

Brown

R. L.

and Richards

J. C.

: ‘Principles of powder mechanics’; 1970, Oxford, Pergamon Press.

Bellehumeur

C. T.

and Tiang

J. S.

: Polym. Eng. Set , 2002, 42, 215–229.

Henein

: Proc. H. H. Kellogg Int. Symp. on ‘Quantitative description of metal extraction processes’ Harriman, NY, USA, September 1991, Minerals, Metals & Materials Society (TMS), 311–329.

McCarthy

J. J.

, Shinbrot

, Metcalfe

, Wolf

J. E.

and Ottino

J. M.

: AIChE J ., 1996, 42, 3351–3363.

10.

Rosato

A. D.

, Prinz

, Standburg

K. J.

and Svendsen

: Phys. Rev. Lett ., 1987, 58, 1038–1040.

11.

Ottino

J. M.

and Khakhar

D. V.

: Annu. Rev. Fluid Mech ., 2000, 32, 55–91.

12.

Allen

M. P.

and Tildesley

D. J.

: ‘Computer simulation of liquids’; 1987, Oxford University Press.

13.

Cleary

P. W.

and Sawley

M. L.

: Appl. Math. Modell ., 2002, 26, 89–111.

14.

Hsiau

S.-S.

and Yang

S.-C.

: Chem. Eng. Set , 2003, 58, 339–351.

15.

Nakashima

: Proc. SICE Annu. Conf., Sapporo, Japan, August, 2004, Society of Instrument and Control Engineers 2527–2530.

16.

Bertrand

, Leclaire

L. A.

and Levecque

: Chem. Eng. Set , 2005, 60, 2517–2531.

17.

Potente

and Pohl

: Proc. ANTEC, Orlando, FL, 2001, Society of Plastics Engineers, 185–189.

18.

Moysey

P. A.

and Thompson

M. R.

: Polym. Eng. Sci ., 2004, 44, 2203–2215.

19.

Rosato

, Prinz

, Standburg

K. J.

and Svendsen

: Powder Technol ., 1986, 49, 59–69.

20.

Campbell

C. S.

: Annu. Rev. Fluid Mech ., 1990, 22, 57–92.

21.

Lian

, Thornton

and Adams

M. J.

: J. Colloid Interf Set , 1993, 161, 138–147.

22.

: ‘Polymer interface and adhesion’; 1982, New York, Marcel Dekker.

23.

Castier

, Cuellar

O. D.

and Tavares

F. W.

: Powder Technol ., 1998, 97, 200–207.

24.

Rosato

A. D.

: ‘Monte Carlo simulation of particulate media segregation’, PhD thesis, Carnegie Mellon University, PA, USA, 1985.

25.

Shahinpoor

: Powder Technol ., 1980, 25, 163–176.

26.

Williams

J. C.

: Powder Technol ., 1976, 15, 245–251.

27.

Samadani

and Kudrolli

: Phys. Rev. Lett ., 2000, 85, 5102–5105.

28.

and McCarthy

J. J.

: Phys. Rev. Lett ., 2003, 90, 184301/ 1–184301/4.

29.

Anand

: ‘Modeling and simulation of cohesive granular flow’, MSc thesis, University of Calgary, Calgary, Canada, 2004.

Modelling of cohesive granular flow in powder processing

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