Computational studies of granular mixing

Particulate systems have proven difficult to probe experimentally in many instances. Simulations of granular flows, and mixing flows in particular, provide a useful means of studying particulate behavior. Mixing flows generate large scale patterns and structures which can be easily visualized. Thus, mixing studies provide a means of indirectly examining granular flows. In this paper we review recent computational studies of tumbler mixing, focusing on two very different, yet complementary, techniques: Particle Dynamics and Lagrangian Simulation. We discuss mixing in different tumbler geometries, as well as segregation and cohesive effects.

[1]  Jpk Seville,et al.  MECHANICAL-PROPERTIES OF COHESIVE PARTICULATE SOLIDS , 1991 .

[2]  K. Z. Y. Yen,et al.  A dynamic simulation of particle rearrangement in powder packings with realistic interactions , 1992 .

[3]  H. Caram,et al.  Tensile strength of wet granula materials , 1997 .

[4]  F. Muzzio,et al.  The structure of mixtures of particles generated by time-dependent flows , 1995 .

[5]  M. Nakagawa,et al.  Non-invasive measurements of granular flows by magnetic resonance imaging , 1993 .

[6]  J. Bridgwater,et al.  Fundamental powder mixing mechanisms , 1976 .

[7]  Colin Thornton,et al.  Numerical simulation of the impact fracture and fragmentation of agglomerates , 1996 .

[8]  P. Cundall,et al.  A discrete numerical model for granular assemblies , 1979 .

[9]  Troy Shinbrot,et al.  Spontaneous chaotic granular mixing , 1999, Nature.

[10]  J. Ottino.  The Kinematics of Mixing: Stretching, Chaos, and Transport , 1989 .

[11]  Nicholas M. Spyrou,et al.  Tomographic Measurements of Granular Flows in Gases and in Liquids , 1994 .

[12]  Julio M. Ottino,et al.  Radial segregation of granular mixtures in rotating cylinders , 1997 .

[13]  J. Bertrand,et al.  Powder mixing: Some practical rules applied to agitated systems , 1991 .

[14]  F J Muzzio,et al.  Chaos, Symmetry, and Self-Similarity: Exploiting Order and Disorder in Mixing Processes , 1992, Science.

[15]  Albert-László Barabási,et al.  MAXIMUM ANGLE OF STABILITY IN WET AND DRY SPHERICAL GRANULAR MEDIA , 1997 .

[16]  David Parker,et al.  A phenomenological study of a batch mixer using a positron camera , 1993 .

[17]  A. Barabasi,et al.  What keeps sandcastles standing? , 1997, Nature.

[18]  J. M. Ottino,et al.  Chaotic mixing of granular materials in two-dimensional tumbling mixers. , 1999, Chaos.

[19]  Julio M. Ottino,et al.  Mixing and Segregation of Granular Materials , 2000 .

[20]  R. Fisher.  Further note on the capillary forces in an ideal soil , 1928, The Journal of Agricultural Science.

[21]  Colin Thornton,et al.  A Theoretical Study of the Liquid Bridge Forces between Two Rigid Spherical Bodies , 1993 .

[22]  R. A. Fisher.  On the capillary forces in an ideal soil; correction of formulae given by W. B. Haines , 1926, The Journal of Agricultural Science.

[23]  J M Ottino,et al.  Segregation-driven organization in chaotic granular flows. , 1999, Proceedings of the National Academy of Sciences of the United States of America.

[24]  W. C. CLARK,et al.  Tensile Strength of Wet Granular Materials , 1967, Nature.

[25]  Julio M. Ottino,et al.  Particle dynamics simulation: a hybrid technique applied to granular mixing , 1998 .

[26]  S. S. Weidenbaum,et al.  A FUNDAMENTAL STUDY OF THE MIXING OF PARTICULATE SOLIDS , 1955 .

[27]  Colin Thornton,et al.  Discrete particle simulation of agglomerate impact coalescence , 1998 .

[28]  P. V. Danckwerts.  The Definition and Measurement of Some Characteristics of Mixtures , 1952 .

[29]  Kei Miyanami,et al.  Optimum combination of size ratio, density ratio and concentration to minimize free surface segregation , 1991 .

[30]  Julio M. Ottino,et al.  Transverse flow and mixing of granular materials in a rotating cylinder , 1997 .