Research output: Contribution to journal › Article › peer-review
Application of the dissipative particle dynamics method to magnetic colloidal dispersions. / Satoh, Akira; Chantrell, Roy W.
In: Molecular Physics: An International Journal at the Interface Between Chemistry and Physics, Vol. 104, No. 20-21, 2006, p. 3287-3302.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Application of the dissipative particle dynamics method to magnetic colloidal dispersions
AU - Satoh, Akira
AU - Chantrell, Roy W.
PY - 2006
Y1 - 2006
N2 - The validity of the application of the dissipative particle dynamics (DPD) method to ferromagnetic colloidal dispersions has been investigated by conducting DPD simulations for a two-dimensional system. First, the interaction between dissipative and magnetic particles has been idealized as some model potentials, and DPD simulations have been carried out using such model potentials for a two magnetic particle system. In these simulations, attention has been focused on the collision time for the two particles approaching each other and touching from an initially separated position, and such collision time has been evaluated for various cases of mass and diameter of dissipative particles and model parameters, which are included in defining the equation of motion of dissipative particles. Next, a multi-particle system of magnetic particles has been treated, and particle aggregates have been evaluated, together with the pair correlation function along an applied magnetic field direction. Such characteristics of aggregate structures have been compared with the results of Monte Carlo and Brownian dynamics simulations in order to clarify the validity of the application of the DPD method to particle dispersion systems. The present simulation results have clearly shown that DPD simulations with the model interaction potential presented here give rise to physically reasonable aggregate structures under circumstances of strong magnetic particle-particle interactions as well as a strong external magnetic field, since these aggregate structures are in good agreement with those of Monte Carlo and Brownian dynamics simulations.
AB - The validity of the application of the dissipative particle dynamics (DPD) method to ferromagnetic colloidal dispersions has been investigated by conducting DPD simulations for a two-dimensional system. First, the interaction between dissipative and magnetic particles has been idealized as some model potentials, and DPD simulations have been carried out using such model potentials for a two magnetic particle system. In these simulations, attention has been focused on the collision time for the two particles approaching each other and touching from an initially separated position, and such collision time has been evaluated for various cases of mass and diameter of dissipative particles and model parameters, which are included in defining the equation of motion of dissipative particles. Next, a multi-particle system of magnetic particles has been treated, and particle aggregates have been evaluated, together with the pair correlation function along an applied magnetic field direction. Such characteristics of aggregate structures have been compared with the results of Monte Carlo and Brownian dynamics simulations in order to clarify the validity of the application of the DPD method to particle dispersion systems. The present simulation results have clearly shown that DPD simulations with the model interaction potential presented here give rise to physically reasonable aggregate structures under circumstances of strong magnetic particle-particle interactions as well as a strong external magnetic field, since these aggregate structures are in good agreement with those of Monte Carlo and Brownian dynamics simulations.
UR - http://www.scopus.com/inward/record.url?scp=34547824209&partnerID=8YFLogxK
U2 - 10.1080/00268970601094437
DO - 10.1080/00268970601094437
M3 - Article
AN - SCOPUS:34547824209
VL - 104
SP - 3287
EP - 3302
JO - Molecular Physics: An International Journal at the Interface Between Chemistry and Physics
JF - Molecular Physics: An International Journal at the Interface Between Chemistry and Physics
SN - 0026-8976
IS - 20-21
ER -