DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Fluctuating hydrodynamic methods for fluid-structure interactions in confined channel geometries

Journal Article · · Applied Mathematics and Mechanics
 [1];  [2];  [3]
  1. Univ. of California, Santa Barbara, CA (United States); US Department of Energy
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Univ. of California, Santa Barbara, CA (United States)

We develop here computational methods for the study of fluid-structure interactions subject to thermal fluctuations when confined within channels with slit-like geometry. The methods take into account the hydrodynamic coupling and diffusivity of microstructures when influenced by their proximity to no-slip walls. We develop stochastic numerical methods subject to no-slip boundary conditions using a staggered finite volume discretization. We introduce techniques for discretizing stochastic systems in a manner that ensures results consistent with statistical mechanics. We show how an exact fluctuation-dissipation condition can be used for this purpose to discretize the stochastic driving fields and combined with an exact projection method to enforce incompressibility. We demonstrate our computational methods by investigating how the proximity of ellipsoidal colloids to the channel wall affects their active hydrodynamic responses and passive diffusivity. We also study for a large number of interacting particles collective drift-diffusion dynamics and associated correlation functions. Furthermore, we expect the introduced stochastic computational methods to be broadly applicable to applications in which confinement effects play an important role in the dynamics of microstructures subject to hydrodynamic coupling and thermal fluctuations.

Research Organization:
Univ. of California, Santa Barbara, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21); National Science Foundation (NSF)
Grant/Contract Number:
SC0009254
OSTI ID:
1633905
Alternate ID(s):
OSTI ID: 1557152; OSTI ID: 22793377
Journal Information:
Applied Mathematics and Mechanics, Journal Name: Applied Mathematics and Mechanics Journal Issue: 1 Vol. 39; ISSN 0253-4827
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (35)

Droplet microfluidics journal January 2008
Confinement Stabilizes a Bacterial Suspension into a Spiral Vortex journal June 2013
DNA electrodiffusion in a 2D array of posts journal March 1994
Numerical Solution of Stochastic Differential Equations book January 1992
Stochastic Eulerian Lagrangian methods for fluid–structure interactions with thermal fluctuations journal April 2011
Static conformation and dynamics of single DNA molecules confined in nanoslits journal July 2007
Microfluidics: Fluid physics at the nanoliter scale journal October 2005
Staggered Schemes for Fluctuating Hydrodynamics journal January 2012
Stochastic Reductions for Inertial Fluid-Structure Interactions Subject to Thermal Fluctuations journal January 2015
Induced-charge electrophoresis near a wall journal February 2011
Hydrodynamic properties of macromolecular complexes. I. Translation journal August 1977
Spatially adaptive stochastic numerical methods for intrinsic fluctuations in reaction–diffusion systems journal May 2010
Mouvement Brownien d'un ellipsoide (II). Rotation libre et dépolarisation des fluorescences. Translation et diffusion de molécules ellipsoidales journal January 1936
Role of Repulsive Forces in Determining the Equilibrium Structure of Simple Liquids journal June 1971
Brownian motion in confinement journal August 2003
Incorporating shear into stochastic Eulerian–Lagrangian methods for rheological studies of complex fluids and soft materials journal December 2013
An algorithm for the machine calculation of complex Fourier series journal May 1965
Hybrid continuum-particle method for fluctuating lipid bilayer membranes with diffusing protein inclusions journal November 2013
The immersed boundary method journal January 2002
Hydromechanics of low-Reynolds-number flow. Part 1. Rotation of axisymmetric prolate bodies journal April 1974
The Design and Implementation of FFTW3 journal February 2005
Simulating the dynamics of inextensible vesicles by the penalty immersed boundary method journal June 2010
Conformation and dynamics of single DNA molecules in parallel-plate slit microchannels journal December 2004
Near-wall hindered Brownian diffusion of nanoparticles examined by three-dimensional ratiometric total internal reflection fluorescence microscopy (3-D R-TIRFM) journal September 2004
Fluid dynamics and noise in bacterial cell-cell and cell-surface scattering journal June 2011
Computational fluctuating fluid dynamics journal August 2010
Quasi-two-dimensional diffusion of single ellipsoids: Aspect ratio and confinement effects journal July 2009
Fluctuating hydrodynamic modeling of fluids at the nanoscale journal February 2007
A stochastic immersed boundary method for fluid-structure dynamics at microscopic length scales journal June 2007
Force-coupling method for flows with ellipsoidal particles journal June 2009
Electrokinetic characterization of individual nanoparticles in nanofluidic channels journal September 2011
Numerical solution of the Navier-Stokes equations journal January 1968
Experimental study of the separation behavior of nanoparticles in micro- and nanochannels journal June 2010
Brownian Motion of an Ellipsoid journal October 2006
Dynamic implicit-solvent coarse-grained models of lipid bilayer membranes: Fluctuating hydrodynamics thermostat journal August 2013