Dynamical Density Functional Theory for Orientable Colloids Including Inertia and Hydrodynamic Interactions
File(s)JOSS-D-16-00069_Revised_Manuscript.pdf (467.65 KB)
Accepted version
Author(s)
Durán-Olivencia, MA
Goddard, BD
Kalliadasis, S
Type
Journal Article
Abstract
Over the last few decades, classical density-functional theory (DFT) and its dynamic extensions (DDFTs) have become powerful tools in the study of colloidal fluids. Recently, previous DDFTs for spherically-symmetric particles have been generalised to take into account both inertia and hydrodynamic interactions, two effects which strongly influence non-equilibrium properties. The present work further generalises this framework to systems of anisotropic particles. Starting from the Liouville equation and utilising Zwanzig’s projection-operator techniques, we derive the kinetic equation for the Brownian particle distribution function, and by averaging over all but one particle, a DDFT equation is obtained. Whilst this equation has some similarities with DDFTs for spherically-symmetric colloids, it involves a translational-rotational coupling which affects the diffusivity of the (asymmetric) particles. We further show that, in the overdamped (high friction) limit, the DDFT is considerably simplified and is in agreement with a previous DDFT for colloids with arbitrary-shape particles.
Date Issued
2016-06-29
Date Acceptance
2016-05-12
Citation
Journal of Statistical Physics, 2016, 164 (4), pp.785-809
ISSN
1572-9613
Publisher
Springer Verlag
Start Page
785
End Page
809
Journal / Book Title
Journal of Statistical Physics
Volume
164
Issue
4
Copyright Statement
© Springer Verlag 2016. The final publication is available at Springer via http://dx.doi.org/10.1007/s10955-016-1545-5.
Sponsor
Commission of the European Communities
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Grant Number
247031
EP/L025159/1
EP/L020564/1
Subjects
Fluids & Plasmas
01 Mathematical Sciences
02 Physical Sciences
Publication Status
Published