Studies on Optical Properties of an Anisotropic Particle Suspension upon Electrical Activation. I. Transmittance Relaxation upon Continuous Electrical Activation in an Anisotropic Particle Suspension.

Design and Construction of an Aerosol Particle Classification System Based on Electrical Mobility

Introduction: The application of particles’ electrical mobility in the electric field has always been an important concern, as the functional basis of a number of particle measuring and classification instrumentations. The objective of this study was to design and construct an aerosol particles classification system using electrical mobility feature in laboratory scale. Methodology: This labo...

TiO2 Pigment Suspension Behaviour upon Adsorption of Polymeric Dispersants

The influence of polymeric dispersants containing different functional groups on TiO2 pigment particle suspension was investigated at pH 6.0 and 9.5, using rheology and particle size data. The dispersants chosen were polyacrylic acid and modified polyacrylamides including homo and copolymers modified with carboxylate and/or hydroxyl groups. The pigment suspension was strongly affected by both p...

Evolution of particle-scale dynamics in an aging clay suspension.

Multispeckle x-ray photon correlation spectroscopy was employed to characterize the slow dynamics of a suspension of highly charged, nanometer-sized disks. At wave vectors q corresponding to interparticle length scales, the dynamic structure factor follows a form f(q,t) approximately exp([-(t/tau)(beta)], where beta approximately 1.5. The relaxation time tau increases with the sample age t(a) a...

Anisotropic single-particle dissipative particle dynamics model

COMMUNICATIONS Single particle and collective orientational relaxation in an anisotropic liquid near the isotropic–nematic transition

We report molecular dynamics simulation results for the single particle and collective orientational correlations for Gay–Berne fluid of anisotropy parameters k53 and k855. The following significant results are reported. ~i! The decay of collective orientational relaxation of rank two is found to slow down appreciably while approaching the isotropic–nematic ~I–N! transition. It eventually becom...