Conformational and rheological properties of semiflexible polymers in shear flow

Winkler, Roland G.

doi:10.1063/1.3497642

Cited by 89 publications

(158 citation statements)

References 83 publications

Supporting

Mentioning

137

Contrasting

Order By: Relevance

“…Brownian motion of particles with arbitrary shapes has been recently investigated in many different contexts, including proteins, DNA, nanofibers, actins or other biological nano and micro objects [1][2][3][4][5][6][7]. There is a rapidly growing number of experimental and numerical studies, which give rise to interesting fundamental questions, challenging for theoreticians.…”

Section: Introductionmentioning

confidence: 99%

Brownian motion of a particle with arbitrary shape

Cichocki

Ekiel-Jeżewska

Wajnryb

2015

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Brownian motion of a particle with arbitrary shape

Cichocki

Ekiel-Jeżewska

Wajnryb

2015

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

“…Dynamics of flexible fibers in simple shear and Poiseuille flows has been analyzed theoretically, numerically and experimentally in numerous publications [1][2][3][4][5][6][7][8][9][10][11][12]. Migration of fibers or vesicles in Poiseuille flow [13][14][15][16][17][18][19] is the fundamental problem of modern lab-on-chip hydrodynamics, important in various biological, medical and industrial contexts, such as Brownian dynamics of proteins, actins, DNA or biological polymers, cell motion, swimming of microorganisms, drug delivery, transport of microparticles [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Lateral migration of flexible fibers in Poiseuille flow between two parallel planar solid walls

2013

View full text Add to dashboard Cite

Abstract. Dynamics of non-Brownian flexible fibers in Poiseuille flow between two parallel planar solid walls is evaluated from the Stokes equations which are solved numerically by the multipole method. Fibers migrate towards a critical distance from the wall z c, which depends significantly on the fiber length N and bending stiffness A. This effect can be used to sort fibers. Three types of accumulation are found, depending on a shear-to-bending parameter Γ . In the first type, stiff fibers deform only a little and accumulate close to the wall, where their tendency to drift away from the channel is balanced by the repulsive hydrodynamic interaction with the wall. In the second type, flexible fibers deform significantly and accumulate far from the wall. In both types, the fiber shapes at the accumulation positions are repeatable, while in the third type, they are very compact and non-repeatable. The difference between the second and third accumulation types is a special case of the difference between the regular and irregular modes for the dynamics of migrating fibers. At the regular mode, far from walls, the fiber tumbling frequency satisfies Jeffery's expression, with the local shear rate and the aspect ratio close to N .

show abstract

“…3,28,31,36,39,40 For example, α is found to be 0.52 in the experiment by Teixeira et al 31 Theoretical calculations predict the exponent α = 2/3 in the asymptotic limit of infinitely large shear rates. 3,28,41 Theoretical studies of the FENE model by Warner 42 suggest that the viscosity of FENE-dumbbell suspensions is determined by the parameter b. We, therefore, examine the viscosity of our FENE-dumbbell fluid with different spring constants but the same FENE parameter.…”

Section: B Rheology Of Fene-dumbbell Fluidsmentioning

confidence: 99%

“…28 At shear rates > 1, tan(2θ ) is expected to exhibit a crossover to the asymptotic power-law decay The simulation data in Fig. 3 for the largest investigated shear rates are in the crossover regime, and follow an effective power law −0.5 .…”

Section: A Dumbbell Orientation Stretching and Tumblingmentioning

confidence: 99%

Mesoscale hydrodynamic modeling of a colloid in shear-thinning viscoelastic fluids under shear flow

Run

Winkler

et al. 2011

The Journal of Chemical Physics

Self Cite

View full text Add to dashboard Cite

In order to study the dynamics of colloidal suspensions with viscoelastic solvents, a simple mesoscopic model of the solvent is required. We propose to extend the multiparticle collision dynamics (MPC) technique-a particle-based simulation method, which has been successfully applied to study the hydrodynamic behavior of many complex fluids with Newtonian solvent-to shear-thinning viscoelastic solvents. Here, the normal MPC particles are replaced by dumbbells with finite-extensible nonlinear elastic (FENE) springs. We have studied the properties of FENE-dumbbell fluids under simple shear flow with shear rateγ . The stress tensor is calculated, and the viscosity η and the first normal-stress coefficient 1 are obtained. Shear-thinning behavior is found for reduced shear rates =γ τ > 1, where τ is a characteristic dumbbell relaxation time. Here, both η and 1 display power-law behavior in the shear-thinning regime. Thus, the FENE-dumbbell fluid with MPC collisions provides a good description of viscoelastic fluids. As a first application, we study the flow behavior of a colloid in a shear-thinning viscoelastic fluid in two dimensions. A slowing down of the colloid rotation in a viscoelastic fluid compared to a Newtonian fluid is obtained, in agreement with recent numerical calculations and experimental results.

show abstract

Conformational and rheological properties of semiflexible polymers in shear flow

Cited by 89 publications

References 83 publications

Brownian motion of a particle with arbitrary shape

Brownian motion of a particle with arbitrary shape

Lateral migration of flexible fibers in Poiseuille flow between two parallel planar solid walls

Mesoscale hydrodynamic modeling of a colloid in shear-thinning viscoelastic fluids under shear flow

Contact Info

Product

Resources

About