Brownian dynamics simulations of shear-thickening in dilute polymer solutions

1996 ◽  
Vol 35 (3) ◽  
pp. 274-287 ◽  
Author(s):  
Savvas G. Hatzikiriakos ◽  
Dimitrios Vlassopoulos
Keyword(s):  
Brownian Dynamics ◽  
Polymer Solutions ◽  
Shear Thickening ◽  
Dilute Polymer Solutions ◽  
Dynamics Simulations ◽  
Brownian Dynamics Simulations

Concentration dependence of shear and extensional rheology of polymer solutions: Brownian dynamics simulations

2006 ◽  
Vol 50 (2) ◽  
pp. 137-167 ◽  
Author(s):  
Christopher Stoltz ◽  
Juan J. de Pablo ◽  
Michael D. Graham
Keyword(s):  
Concentration Dependence ◽  
Brownian Dynamics ◽  
Polymer Solutions ◽  
Extensional Rheology ◽  
Dynamics Simulations ◽  
Brownian Dynamics Simulations

scholarly journals Brownian dynamics simulations of planar mixed flows of polymer solutions at finite concentrations

2015 ◽  
Vol 121 ◽  
pp. 245-257 ◽  
Author(s):  
Aashish Jain ◽  
Chandi Sasmal ◽  
Remco Hartkamp ◽  
B.D. Todd ◽  
J. Ravi Prakash
Keyword(s):  
Brownian Dynamics ◽  
Polymer Solutions ◽  
Mixed Flows ◽  
Dynamics Simulations ◽  
Brownian Dynamics Simulations ◽  
Finite Concentrations

Conformationally averaged iterative Brownian dynamics simulations of semidilute polymer solutions

2018 ◽  
Vol 149 (17) ◽  
pp. 174904 ◽  
Author(s):  
Charles D. Young ◽  
Michael Marvin ◽  
Charles E. Sing
Keyword(s):  
Brownian Dynamics ◽  
Polymer Solutions ◽  
Dynamics Simulations ◽  
Brownian Dynamics Simulations

scholarly journals A lattice Boltzmann method for dilute polymer solutions

2011 ◽  
Vol 369 (1944) ◽  
pp. 2301-2310 ◽  
Author(s):  
Shiwani Singh ◽  
Ganesh Subramanian ◽  
Santosh Ansumali
Keyword(s):  
Lattice Boltzmann ◽  
Brownian Dynamics ◽  
Polymer Solutions ◽  
Local Equilibrium ◽  
Planck Equation ◽  
Simulation Techniques ◽  
Dilute Polymer Solutions ◽  
Distribution Phase ◽  
Space Dynamics ◽  
Dynamics Simulations

We present a lattice Boltzmann approach for the simulation of non-Newtonian fluids. The method is illustrated for the specific case of dilute polymer solutions. With the appropriate local equilibrium distribution, phase-space dynamics on a lattice, driven by a Bhatnagar–Gross–Krook (BGK) relaxation term, leads to a solution of the Fokker–Planck equation governing the probability density of polymer configurations. Results for the bulk rheological characteristics for steady and start-up shear flow are presented, and compare favourably with those obtained using Brownian dynamics simulations. The new method is less expensive than stochastic simulation techniques, particularly in the range of small to moderate Weissenberg numbers (W i ).

scholarly journals Structure evolution of suspensions under time-dependent electric or magnetic field

2021 ◽  
Author(s):  
Konstantinos Manikas ◽  
Markus Hütter ◽  
Patrick D. Anderson
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Brownian Dynamics ◽  
Thermal Fluctuations ◽  
Time Dependent ◽  
Structure Evolution ◽  
Strength Increase ◽  
Large Rotation ◽  
Dynamics Simulations ◽  
Brownian Dynamics Simulations

AbstractThe effect of time-dependent external fields on the structures formed by particles with induced dipoles dispersed in a viscous fluid is investigated by means of Brownian Dynamics simulations. The physical effects accounted for are thermal fluctuations, dipole-dipole and excluded volume interactions. The emerging structures are characterised in terms of particle clusters (orientation, size, anisotropy and percolation) and network structure. The strength of the external field is increased in one direction and then kept constant for a certain amount of time, with the structure formation being influenced by the slope of the field-strength increase. This effect can be partially rationalized by inhomogeneous time re-scaling with respect to the field strength, however, the presence of thermal fluctuations makes the scaling at low field strength inappropriate. After the re-scaling, one can observe that the lower the slope of the field increase, the more network-like and the thicker the structure is. In the second part of the study the field is also rotated instantaneously by a certain angle, and the effect of this transition on the structure is studied. For small rotation angles ($$\theta \le 20^{{\circ }}$$ θ ≤ 20 ∘ ) the clusters rotate but stay largely intact, while for large rotation angles ($$\theta \ge 80^{{\circ }}$$ θ ≥ 80 ∘ ) the structure disintegrates and then reforms, due to the nature of the interactions (parallel dipoles with perpendicular inter-particle vector repel each other). For intermediate angles ($$20<\theta <80^{{\circ }}$$ 20 < θ < 80 ∘ ), it seems that, during rotation, the structure is altered towards a more network-like state, as a result of cluster fusion (larger clusters). The details provided in this paper concern an electric field, however, all results can be projected into the case of a magnetic field and paramagnetic particles.

scholarly journals Influence of size polydispersity on magnetic field tunable structures in magnetic nanofluids containing superparamagnetic nanoparticles.

2021 ◽  
Author(s):  
Dillip Kumar Mohapatra ◽  
Philip James Camp ◽  
John Philip
Keyword(s):  
Magnetic Field ◽  
Particle Size ◽  
Light Scattering ◽  
Optical Microscopy ◽  
Brownian Dynamics ◽  
Phase Contrast ◽  
Superparamagnetic Nanoparticles ◽  
Magnetic Nanofluids ◽  
Dynamics Simulations ◽  
Brownian Dynamics Simulations

We probe the influence of particle size polydispersity on field-induced structures and structural transitions in magnetic fluids (ferrofluids) using phase contrast optical microscopy, light scattering and Brownian dynamics simulations. Three...

scholarly journals Hard discs under steady shear: comparison of Brownian dynamics simulations and mode coupling theory

2009 ◽  
Vol 367 (1909) ◽  
pp. 5033-5050 ◽  
Author(s):  
Oliver Henrich ◽  
Fabian Weysser ◽  
Michael E. Cates ◽  
Matthias Fuchs
Keyword(s):  
Brownian Dynamics ◽  
Mode Coupling ◽  
Transition Density ◽  
Two Dimensions ◽  
Coupling Theory ◽  
Mode Coupling Theory ◽  
Stationary Structure ◽  
Homogeneous Shear Flow ◽  
Dynamics Simulations ◽  
Brownian Dynamics Simulations

Brownian dynamics simulations of bidisperse hard discs moving in two dimensions in a given steady and homogeneous shear flow are presented close to and above the glass transition density. The stationary structure functions and stresses of shear-melted glass are compared quantitatively to parameter-free numerical calculations of monodisperse hard discs using mode coupling theory within the integration through transients framework. Theory qualitatively explains the properties of the yielding glass but quantitatively overestimates the shear-driven stresses and structural anisotropies.

Brownian dynamics simulations for interacting colloids in the presence of a shear flow

1989 ◽  
Vol 40 (3) ◽  
pp. 1709-1712 ◽  
Author(s):  
Weige Xue ◽  
Gary S. Grest
Keyword(s):  
Shear Flow ◽  
Brownian Dynamics ◽  
Dynamics Simulations ◽  
Brownian Dynamics Simulations
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