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用耗散粒子动力学方法对铁磁流体在外加恒定磁场作用下的凝聚行为进行了三维模拟.基于Flory-Huggins相混理论得到包括磁性颗粒珠子间的通常意义上的相互作用参数;利用Ewald方法把单磁畴结构的磁性颗粒长程的磁性相互作用转换成短程加和形式,从而得到磁偶极子的磁性相互作用参数.模拟结果表明,外加磁场强度是形成凝聚结构的关键因素,其大小决定凝聚柱状结构的直径、长度和密度等性质;铁磁流体中磁性颗粒数目百分比高对于柱状结构的形成有利,磁性珠子中的铁磁颗粒拓扑增加会提高凝聚的几率.

参考文献

[1] Satoh A.;Kamiyama S.;Coverdale GN.;Chantrell RW. .THREE DIMENSIONAL MONTE CARLO SIMULATIONS OF THICK CHAINLIKE CLUSTERS COMPOSED OF FERROMAGNETIC FINE PARTICLES[J].Journal of Colloid and Interface Science,1996(2):422-428.
[2] Hirabayashi M;Chen Y;Ohashi H .[J].Computer Physics Communications,2001,142:148-150.
[3] Xuan Y;Ye M;Li Q .[J].International Journal of Heat and Mass Transfer,2005,48:2443-245l.
[4] Satoh A;Chantrell RW .Application of the dissipative particle dynamics method to magnetic colloidal dispersions[J].Molecular physics,2006(20/21):3287-3302.
[5] Kuo M Y;Yang H C;Hua C Y et al.[J].ChemPhysChem:A European Journal of Chemical Physics and Physical Chemistry,2004,5:575-580.
[6] Groot RD.;Warren PB. .DISSIPATIVE PARTICLE DYNAMICS - BRIDGING THE GAP BETWEEN ATOMISTIC AND MESOSCOPIC SIMULATION[J].The Journal of Chemical Physics,1997(11):4423-4435.
[7] Wang Z;Holm C;MUller H W .[J].Journal of Chemical Physics,2003,119(01):379-387.
[8] Romero AH;Mejia-Lopez J .Ground state geometries and hysteresis loops of small granular ferrofluids as function of coating[J].Physica, B. Condensed Matter,2006(1/2):244-248.
[9] Rosensweig R E.Ferrohydrodynamics[M].Cambridge:Cambridge University Press,1985:35.
[10] Popplewell J;Davis P;Bradbury A et al.[J].IEEE Transactions on Magnetics,1986,22(05):1128-1130.
[11] Jeyadevan B;Nakatani I .[J].Journal of Magnetism and Magnetic Materials,1999,201:62-65.
[12] Elfimova E A .[J].Journal of Magnetism and Magnetic Materials,2005,289:219-221.
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