Pattern formation in particle systems driven by color field

Liu, Xiaoxing, Qi, Huabiao, Ge, Wei and Li, Jinghai (2008) Pattern formation in particle systems driven by color field. Particuology, 6 6: 515-520. doi:10.1016/j.partic.2008.07.021


Author Liu, Xiaoxing
Qi, Huabiao
Ge, Wei
Li, Jinghai
Title Pattern formation in particle systems driven by color field
Journal name Particuology   Check publisher's open access policy
ISSN 1674-2001
2210-4291
Publication date 2008-12
Sub-type Article (original research)
DOI 10.1016/j.partic.2008.07.021
Volume 6
Issue 6
Start page 515
End page 520
Total pages 6
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Formatted abstract
The structural evolution of systems with two kinds of particles driven in opposite directions, i.e., driven by a color field, is investigated by molecular dynamics simulations. Gaussian thermostat, a common treatment to restrict the thermal velocity of the particles in the systems, has been used so as to account for the dissipation of heat and allow the system to reach a steady state. It has been found that with the increase of the strength of driving force (F), the system undergoes an obvious structural transition from an initially random mixing state to a state characterized by separate lanes and in each lane only one kind of particles exists. The analysis shows that the reason for the formation of lane structure is not only the increase of F but also the variation of particle friction coefficient. While using Gaussian thermostat the particle friction coefficient becomes a function of F. Increasing F leads to high particle friction coefficient and inevitably results in lane formation for strong enough driving force. When lifting the effect of F on friction coefficient and choosing a constant friction coefficient, our results show that for a given F there always exists a critical value of friction coefficient higher than which the system will develop into lane structure.
Keyword Color field
Molecular dynamics (MD)
Simulation
Lane formation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: ERA 2012 Admin Only
Earth Systems Science Computational Centre Publications
 
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Created: Fri, 14 Oct 2011, 08:44:22 EST by Xiaoxing Liu on behalf of Earth Systems Science Computational Centre