Shear-induced interfacial assembly of Janus particles

被引:10
作者
Rezvantalab, Hossein [1 ]
Connington, Kevin W. [2 ]
Shojaei-Zadeh, Shahab [1 ]
机构
[1] Rutgers State Univ, Dept Mech & Aerosp Engn, 98 Brett Rd, Piscataway, NJ 08854 USA
[2] Stevens Inst Technol, Dept Mech Engn, 1 Castle Point Terrace, Hoboken, NJ 07030 USA
来源
PHYSICAL REVIEW FLUIDS | 2016年 / 1卷 / 07期
关键词
DISCRETIZED BOLTZMANN-EQUATION; OIL-WATER INTERFACE; LATTICE-BOLTZMANN; CAPILLARY FORCES; PARTICULATE SUSPENSIONS; NUMERICAL SIMULATIONS; COLLOIDAL PARTICLES; ELECTRIC-FIELD; INDUCED ORDER; NANOPARTICLES;
D O I
10.1103/PhysRevFluids.1.074205
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
We investigate the hydrodynamics of spherical Janus particles at the interface between two immiscible fluids using a multicomponent lattice-Boltzmann method. The CahnHilliard model is used to evolve the composition for this binary system of incompressible fluids, while the particle-fluid interactions are taken into account by adding a supplemental force to recover the appropriate wettability at solid boundaries. We evaluate the capillaryinduced interactions between multiple Janus particles at a sheared interface and demonstrate the possibility of directing their assembly. In response to the flow, all particles approach a steady orientation resulting from the balance between shear-induced torque and the resistance due to preferred wetting. At sufficiently large shear rates leading to strong capillary dipoles, the particles rearrange and form chains normal to the shear direction. For the particle sizes considered, an intermediate window of surface coverage between 32% and 65% is found to give effective alignment with order parameters in the range of 0.7-1.0. An interesting feature of this directed assembly method is that the structure is preserved after removing the flow field: Janus particles only rotate to upright orientation without disintegrating the chains. This approach can enable directing a randomly oriented or distributed cluster of Janus particles into an ordered structure with controllable rheological properties.
引用
收藏
页数:14
相关论文
共 44 条
[1]   SHEAR INDUCED ORDER AND SHEAR PROCESSING OF MODEL HARD-SPHERE SUSPENSIONS [J].
ACKERSON, BJ .
JOURNAL OF RHEOLOGY, 1990, 34 (04) :553-590
[2]  
Bianchi E, 2015, SOFT MATTER, V11, P3767, DOI 10.1039/c5sm00281h
[3]   Particles adsorbed at the oil-water interface: A theoretical comparison between spheres of uniform wettability and "Janus" particles [J].
Binks, BP ;
Fletcher, PDI .
LANGMUIR, 2001, 17 (16) :4708-4710
[4]   Self-assembly of nanoparticles at interfaces [J].
Boeker, Alexander ;
He, Jinbo ;
Emrick, Todd ;
Russell, Thomas P. .
SOFT MATTER, 2007, 3 (10) :1231-1248
[5]  
CASAGRANDE C, 1988, CR ACAD SCI II, V306, P1423
[6]   STRUCTURAL-CHANGES AND ORIENTATIONAL ORDER IN A SHEARED COLLOIDAL SUSPENSION [J].
CHEN, LB ;
ZUKOSKI, CF ;
ACKERSON, BJ ;
HANLEY, HJM ;
STRATY, GC ;
BARKER, J ;
GLINKA, CJ .
PHYSICAL REVIEW LETTERS, 1992, 69 (04) :688-691
[7]   A critical review of the pseudopotential multiphase lattice Boltzmann model: Methods and applications [J].
Chen, Li ;
Kang, Qinjun ;
Mu, Yutong ;
He, Ya-Ling ;
Tao, Wen-Quan .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2014, 76 :210-236
[8]   Interaction of fluid interfaces with immersed solid particles using the lattice Boltzmann method for liquid-gas-particle systems [J].
Connington, Kevin W. ;
Lee, Taehun ;
Morris, Jeffrey F. .
JOURNAL OF COMPUTATIONAL PHYSICS, 2015, 283 :453-477
[9]   ELECTRIC-FIELD-INDUCED ASSOCIATION OF COLLOIDAL PARTICLES [J].
FRADEN, S ;
HURD, AJ ;
MEYER, RB .
PHYSICAL REVIEW LETTERS, 1989, 63 (21) :2373-2376
[10]   Effects of nanoparticles and surfactant on droplets in shear flow [J].
Frijters, Stefan ;
Gunther, Florian ;
Harting, Jens .
SOFT MATTER, 2012, 8 (24) :6542-6556