scholarly journals Colloidal diffusion and hydrodynamic screening near boundaries

Soft Matter ◽  
2011 ◽  
Vol 7 (15) ◽  
pp. 6844 ◽  
Author(s):  
Pushkar P. Lele ◽  
James W. Swan ◽  
John F. Brady ◽  
Norman J. Wagner ◽  
Eric M. Furst
Keyword(s):  
Hydrodynamic Screening ◽  
Colloidal Diffusion

scholarly journals Sedimentation, Péclet number, and hydrodynamic screening

2007 ◽  
Vol 76 (5) ◽  
Author(s):  
Kiley Benes ◽  
Penger Tong ◽  
Bruce J. Ackerson
Keyword(s):  
Peclet Number ◽  
Péclet Number ◽  
Hydrodynamic Screening

scholarly journals Inside Cover: Robust Chirped Photonic Crystals Created by Controlled Colloidal Diffusion (Angew. Chem. Int. Ed. 49/2011)

2011 ◽  
Vol 50 (49) ◽  
pp. 11542-11542
Author(s):  
Shin-Hyun Kim ◽  
Woong Chan Jeong ◽  
Hyerim Hwang ◽  
Seung-Man Yang
Keyword(s):  
Photonic Crystals ◽  
Colloidal Diffusion

Hydrodynamics and Semi-Flexible Filament Behavior

2009 ◽  
Author(s):  
Preethi L. Chandran ◽  
Mohammad R. K. Mofrad
Keyword(s):  
Friction Coefficient ◽  
Brownian Dynamics ◽  
Driving Force ◽  
Hydrodynamic Interaction ◽  
Force Transmission ◽  
Elastic Bending ◽  
Flexible Filament ◽  
Hydrodynamic Screening ◽  
Tissue Matrix ◽  
Solvent Flow

In this paper we simulate the effect of hydrodynamic interaction on the Brownian dynamics of semiflexible filaments. Semiflexible filaments are those whose entropy-driven bending fluctuations are resisted by the elastic bending stiffness. Semiflexible filaments make up the structural scaffold of cell and tissue matrix, and understanding their dynamic behavior is necessary for studying force transmission and remodeling in cells and tissue matrix. Hydrodynamic interaction refers to force on filament mediated through the local solvent flow around it. The local solvent flow is induced by the motion of the filament itself. Dynamic studies of semiflexible filaments tend to assume a uniform friction coefficient at every point on the filament. However Lagamarsino et al [1] showed that even for a filament in uniform translation, most of the drag is localized at the filament ends, which increases the tendency of the filament to bend and rotate even under a uniform driving force. In this paper we explore how the combined effect of non-uniform friction coefficient due to hydrodynamic screening and the non-uniform local solvent flow due to the filament fluctuations affects its Brownian dynamics.

scholarly journals Entrainment of mammalian motile cilia in the brain with hydrodynamic forces

2020 ◽  
Vol 117 (15) ◽  
pp. 8315-8325 ◽  
Author(s):  
Nicola Pellicciotta ◽  
Evelyn Hamilton ◽  
Jurij Kotar ◽  
Marion Faucourt ◽  
Nathalie Delgehyr ◽  
...  
Keyword(s):  
Hydrodynamic Forces ◽  
Coordination Mechanism ◽  
Similar Frequency ◽  
Brain Ventricles ◽  
Flagellar Beat ◽  
Multiciliated Cells ◽  
Hydrodynamic Screening ◽  
Motile Cilia ◽  
External Flows ◽  
The Brain

Motile cilia are widespread across the animal and plant kingdoms, displaying complex collective dynamics central to their physiology. Their coordination mechanism is not generally understood, with previous work mainly focusing on algae and protists. We study here the entrainment of cilia beat in multiciliated cells from brain ventricles. The response to controlled oscillatory external flows shows that flows at a similar frequency to the actively beating cilia can entrain cilia oscillations. We find that the hydrodynamic forces required for this entrainment strongly depend on the number of cilia per cell. Cells with few cilia (up to five) can be entrained at flows comparable to cilia-driven flows, in contrast with what was recently observed in Chlamydomonas. Experimental trends are quantitatively described by a model that accounts for hydrodynamic screening of packed cilia and the chemomechanical energy efficiency of the flagellar beat. Simulations of a minimal model of cilia interacting hydrodynamically show the same trends observed in cilia.

Diffusion of Colloidal Spheres in Rod-Networks: Hydrodynamic Screening and Electrostatic Interactions

2008 ◽  
Author(s):  
Kyongok Kang ◽  
Jan K. G. Dhont ◽  
A. Wilk ◽  
A. Patkowski ◽  
Albert Co ◽  
...  
Keyword(s):  
Electrostatic Interactions ◽  
Colloidal Spheres ◽  
Hydrodynamic Screening

scholarly journals Hydrodynamic screening near planar boundaries: Effects on semiflexible polymer dynamics

2011 ◽  
Vol 134 (23) ◽  
pp. 235102 ◽  
Author(s):  
Yann von Hansen ◽  
Michael Hinczewski ◽  
Roland R. Netz
Keyword(s):  
Polymer Dynamics ◽  
Semiflexible Polymer ◽  
Hydrodynamic Screening
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