Entropic transport of finite size particles
نویسندگان
چکیده
منابع مشابه
Entropic transport of finite size particles.
Transport of spherical Brownian particles of finite size possessing radii R ≤ R(max) through narrow channels with varying cross-section width is considered. Applying the so-called Fick-Jacobs approximation, i.e. assuming fast equilibration in the direction orthogonal to the channel axis, the 2D problem can be described in terms of a 1D effective dynamics in which bottlenecks cause entropic barr...
متن کاملTurbulent transport of material particles: an experimental study of finite size effects.
We present experimental Lagrangian statistics of finite sized, neutrally bouyant, particles transported in an isotropic turbulent flow. The particle's diameter is varied over turbulent inertial scales. Finite size effects are shown not to be trivially related to velocity intermittency. The global shape of the particle's acceleration probability density functions is not found to depend significa...
متن کاملHydrodynamically enforced entropic trapping of Brownian particles.
We study the transport of Brownian particles through a corrugated channel caused by a force field containing curl-free (scalar potential) and divergence-free (vector potential) parts. We develop a generalized Fick-Jacobs approach leading to an effective one-dimensional description involving the potential of mean force. As an application, the interplay of a pressure-driven flow and an oppositely...
متن کاملDiffusion and binding of finite-size particles in confined geometries.
Describing the diffusion of particles through crowded, confined environments with which they can interact is of considerable biological and technological interest. Under conditions where the confinement dimensions become comparable to the particle dimensions, steric interactions between particles, as well as particle-wall interactions, will play a crucial role in determining transport propertie...
متن کاملClumps and patches in self-aggregation of finite size particles
New model equations are derived for dynamics of self-aggregation of finite-size particles. Differences from standard Debye-Hückel [1] and Keller-Segel [2] models are: a) the mobility μ of particles depends on the locally-averaged particle density and b) linear diffusion acts on that locally-averaged particle density. The cases both with and without diffusion are considered here. Surprisingly, t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics: Condensed Matter
سال: 2010
ISSN: 0953-8984,1361-648X
DOI: 10.1088/0953-8984/22/45/454109