Chin. Phys. Lett.  2005, Vol. 22 Issue (8): 2119-2122    DOI:
Original Articles |
Towards an Understanding of the Influence of Sedimentation on Colloidal Aggregation by Peclet Number
SUN Zhi-Wei;LIU Jie;XU Sheng-Hua
NML, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080
Cite this article:   
SUN Zhi-Wei, LIU Jie, XU Sheng-Hua 2005 Chin. Phys. Lett. 22 2119-2122
Download: PDF(217KB)  
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
Abstract The Peclet number is a useful index to estimate the importance of sedimentation as compared to the Brownian motion. However, how to choose the characteristic length scale for the Peclet number evaluation is rather critical because the diffusion length increases as the square root of the time whereas the drifting length is linearly related to time. Our Brownian dynamics simulation shows that the degree of sedimentation influence on the coagulation decreases when the dispersion volume fraction increases. Therefore using a fixed length, such as the diameter of particle, as the characteristic length scale for Peclet number evaluation is not a good choice when dealing with the influence of sedimentation on coagulation. The simulations demonstrated that environmental factors in the coagulation process, such as dispersion volume fraction and size distribution, should be taken into account for more reasonable evaluation of the sedimentation influence.

Keywords: 82.70.Kj      82.70.Dd      83.10.Mj     
Published: 01 August 2005
PACS:  82.70.Kj (Emulsions and suspensions)  
  82.70.Dd (Colloids)  
  83.10.Mj (Molecular dynamics, Brownian dynamics)  
TRENDMD:   
URL:  
https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2005/V22/I8/02119
Service
E-mail this article
E-mail Alert
RSS
Articles by authors
SUN Zhi-Wei
LIU Jie
XU Sheng-Hua
Related articles from Frontiers Journals
[1] WANG Xian-Ju, LI Hai, LI Xin-Fang, WANG Zhou-Fei**, LIN Fang . Stability of TiO2 and Al2O3 Nanofluids[J]. Chin. Phys. Lett., 2011, 28(8): 2119-2122
[2] XIE Shi-Feng, CHEN Shang-Da**, SOH Ai-Kah . The Effect of Atomic Vacancies and Grain Boundaries on Mechanical Properties of GaN Nanowires[J]. Chin. Phys. Lett., 2011, 28(6): 2119-2122
[3] LIAN Zeng-Ju** . Interaction of a Spherical Colloid and a Porous Membrane in a Bulk Electrolyte[J]. Chin. Phys. Lett., 2011, 28(5): 2119-2122
[4] M. Todica**, C. V. Pop, Luciana Udrescu, Traian Stefan . Spectroscopy of a Gamma Irradiated Poly(Acrylic Acid)-Clotrimazole System[J]. Chin. Phys. Lett., 2011, 28(12): 2119-2122
[5] M. Todica. Analysis of Rheological Behavior of Some Aqueous PEO Gels under Thermal Treatment[J]. Chin. Phys. Lett., 2009, 26(7): 2119-2122
[6] WANG Xian-Ju, LI Xin-Fang. Influence of pH on Nanofluids' Viscosity and Thermal Conductivity[J]. Chin. Phys. Lett., 2009, 26(5): 2119-2122
[7] M. Todica. Observation of Hydration--Drying Effect on Clotrimazole--Carbopol System[J]. Chin. Phys. Lett., 2008, 25(7): 2119-2122
[8] YAO Can, WANG Yu-Ren, LAN Ding, DUAN Li, KANG Qi. An in-situ Observation on Initial Aggregation Process of Colloidal Particles near Three-Phase Contact Line of Air, Water and Vertical Substrate[J]. Chin. Phys. Lett., 2008, 25(10): 2119-2122
[9] GUO Ji-Yuan, XIAO Chang-Ming. Grand Canonical Ensemble Monte Carlo Simulation of Depletion Interactions in Colloidal Suspensions[J]. Chin. Phys. Lett., 2008, 25(1): 2119-2122
[10] CHEN Jiang-Xing, JIAO Zheng-Kuan. Mode-Locking Behaviour in Driven Colloids with Random Pinning[J]. Chin. Phys. Lett., 2007, 24(4): 2119-2122
[11] LI Hua-Bing, ZHANG Chao-Ying, LU Xiao-Yang, FANG Hai-Ping. An Effective Method on Two-Dimensional Lattice Boltzmann Simulations with Moving Boundaries[J]. Chin. Phys. Lett., 2007, 24(12): 2119-2122
[12] PU Sheng-Li, CHEN Xian-Feng, DI Zi-Yun, GENG Tao, XIA Yu-Xing. Electrical Properties of Nanostructured Magnetic Colloid and Influence of Magnetic Field[J]. Chin. Phys. Lett., 2007, 24(11): 2119-2122
[13] LI Chun-Shu, GAO Hai-Xia, XIAO Chang-Ming. Depletion Interactions in a Cylindric Pipeline with a Small Shape Change[J]. Chin. Phys. Lett., 2007, 24(11): 2119-2122
[14] XIAO Chang-Ming, GUO Ji-Yuan, HU Ping. A Monte Carlo Study of Influences on Depletion Force from Another Large Sphere in Colloidal Suspensions[J]. Chin. Phys. Lett., 2006, 23(4): 2119-2122
[15] GUO Ji-Yuan, LI Chun-Shu, XIAO Chang-Ming. Effect of Geometrical Confinement on Depletion Interactions in Colloidal Suspensions[J]. Chin. Phys. Lett., 2005, 22(5): 2119-2122
Viewed
Full text


Abstract