Dispersion of colloidal agglomerate in mesoscale modelled by a hybrid fluid particle model elastic properties of the rectangular crystalline phase of planar hard cyclic pentamers

• Autorzy: Dzwinel W. , Yuen D. A.
• Konferencja: MD Simulations in Poland: 1st National Symposium (28-30.09.2000, Gdańsk)
• Języki publikacji: EN

Abstrakty

EN

The dispersion of the agglomerating fluid process involving colloids has been investigated at the mesoscale level by a discrete particle approach - the hybrid fluid particle model (FPM). Dynamical processes occurring in the granulation of colloidal agglomerate in solvents are severely influenced by coupling between the dispersed microstructures and the global flow. On the mesoscale this coupling is further exacerbated by thermal fluctuations, particle-particle interactions between colloidal beds and hydrodynamic interactions between colloidal beds and the solvent. Using the method of FPM, we have tackled the problem of dispersion of a colloidal slab being accelerated in a long box filled with a fluid. Our results show that the average size of the agglomerated fragments decrease with increasing shearing rate gamma, according to the power-law A*gamma k, where k is around 2. For larger values of gamma, the mean size of the agglomerate S_avg increases slowly with gamma from the collisions between the aggregates and the longitudinal stretching induced by the flow. The proportionality constant A increases exponentially with the scaling factor of the attractive forces acting between the colloidal particles. The value of A shows a rather weak dependence on the solvent viscosity. However, A increases proportionally with the scaling factor of the colloid-solvent dissipative interactions. These results may be applied to enhance our understanding concerning the nonlinear complex interaction occurring in mesoscopic flows such as blood flow in small vessels.

Słowa kluczowe

EN

fluid particle model; mesoscopic flow; colloidal agglomerate; fragmentation; agglomeration

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 2001
• Tom: Vol. 5, No 3
• Strony: 355--371
• Opis fizyczny: Bibliogr. 43 poz., rys., tab.

Twórcy

autor

Dzwinel W.

• AGH Institute of Computer Science, Al. Mickiewicza 30, 30-059 Cracow, Poland

autor

Yuen D. A.

• Minnesota Supercomputer Institute, University of Minnesota, Minneapolis, Minnesota 55415-1227, USA

Bibliografia

• [1] Moseler M and Landman U 2000 Science 289 1165
• [2] Ottino J M, De Roussel P, Hansen S and Khakhar D V 2000 Advances in Chemical Engineering 25 105
• [3] Prausnitz J and Wu J 2000 En Vision 16 18
• [4] Gast A P and Russel W B 1998 Physics Today 24
• [5] Latinopoulos P and Ganoulis J 1982 Applied Mathematical Modelling 6 55
• [6] Misra J C and Sahu B K 1998 Computers & Mathematics with Applications 16/12 993
• [7] Burda P and Korenar J 1996 Akademie Verlag. Zeitschrift fur Angewandte Mathematik und Mechanik 76 365
• [8] Gueraoui K, Hammoumi A and Zeggwagh G 1998 Computes Rendus de l Academie des Sciences Serie II Fascicule B-Mecanique Physique Chimie Astronomie 326 561
• [9] Groisman A and Stainberg V 2000 Nature 405 53
• [10] Fung Y C and Zweifach B W 1971 Annual Review of Fluid Mechanics III 189
• [11] Alda W, Dzwinel W, Kitowski J, Moscinski J, Pogoda M and Yuen D A 1998 Computers in Physics 12 (6) 595
• [12] Dzwinel W, Alda W, Pogoda M and Yuen D A 2000 Physica D 137 157
• [13] Vashishta P and Nakano A 1999 Computing in Science and Engineering 20
• [14] Wagner A J and Yeomans J M 2000 Phys. Rev. E (submitted)
• [15] Chopard B and Droz M 1998 Cellular Automata Modelling of Physical Systems Cambridge University Press
• [16] Swift M R, Orlandini E and Osbors W R 1996 Phys. Rev. E 54 5041
• [17] Meakin P 1998 Fractals, scaling and growth far from equilibrium Cambridge University Press
• [18] Choi H G and Joseph D D 2000 University of Minnesota Supercomputing Institute Research Report UMSI 2000/17
• [19] Glowinski R, Pan T W, Hela T I, Joseph D D and Priaux J 2000 University of Minnesota Supercomputing Institute Research Report UMSI 2000/68
• [20] Ihle T and Kroll D M 2001 Rhys. Rev. E 63 020201
• [21] Talu I, Tardos G I and Khan M I 2000 Powder Technol. 110 59
• [22] Hoogerbrugge P J and Koelman J M V A 1992 Europhysics Letters 19 3 155
• [23] Espa˜nol P 1998 Phys. Rev. E 57 2930
• [24] Marsh C, Backx G and Ernst M H 1977 Phys. Rev. E 56 1976
• [25] Coveney P V and Novik K E 1996 Phys. Rev. E 54 5134
• [26] Dzwinel W and Yuen D A 2000 International Journal of Modern Physics C 11 1
• [27] Dzwinel W and Yuen D A 2000 J. Colloid Interface Science 225 179
• [28] Dzwinel W and Yuen D A 2000 International Journal of Modern Physics C 11 1037
• [29] Dzwinel W and Yuen D A 1999 Molecular Simulation 22 369
• [30] Clark A T, Lal M, Ruddock J N and Warren P B 2000 Langmuir 16 6342
• [31] Dzwinel W and Yuen D A 2001 International Journal of Modern Physics C accepted for publication
• [32] Boryczko K, Dzwinel W and Yuen D A 2000 Minnesota Supercomputing Institute Research Reports UMSI 2000/142 and Proceedings of 1st SGI Users Conference Cracow, Poland ACC Cyfronet UMM 231
• [33] Libersky L D, Petschek A G, Carney T C, Hipp J R and Allahdadi F A 1993 J. Comp. Phys 109 67
• [34] Daniel J C and Audebert R 1999 Small Volumes and Large Surfaces: The World of Colloids, in: Soft Matter Physics Eds. Daoud M, and Williams C E, Springer Verlag 320
• [35] Grier D G and Behrens S H 2001 Interactions in colloidal suspensions in Electrostatic effects in Soft Matter and Biphysics Ed. Holm C, Keikchoff P, Podgornik R, Kluwer
• [36] Yaman K, Jeppesen C and Marques C M 1998 Europhys. Lett 42 221
• [37] Larsen A and Grier D G 1997 Nature 385 230
• [38] Serrano M and Espa˜nol P 2000 Phys. Rev. E (submitted)
• [39] Hockney R W and Eastwood J W 1981 Computer Simulation Using Particles McGraw-Hill Inc.
• [40] Kubo R 1965 Statistical Mechanics Wiley, New York
• [41] Chapman S and Cowling T G 1990 The Mathematical Theory of Non-uniform Gases Cambridge University Press
• [42] Espa˜nol P and Serrano M 1999 Phys. Rev. E 59 6340
• [43] Li Jinghai 2000 Powder Techol. 111 50