An Analysis of Nanoparticle Settling Times in Liquids

TL;DR

This paper introduces an analytical model for predicting the settling times of nano-to-micro particles in liquids, addressing a knowledge gap for small particle sizes and incorporating particle shape and fractal dimensions.

Contribution

The paper presents a novel analytical model combining classical equations and graphical methods for nano-to-micro particle settling, validated with experimental data.

Findings

Model shows order of magnitude agreement with experimental data.

Can accommodate non-spherical particles and fractal dimensions.

Provides a calculation sequence for practical use.

Abstract

Aggregation and settling are crucial phenomena that involve particulate systems. For particle sizes of millimetre and above, there are reasonable accurate predicting tools. However for smaller particle sizes, there appears to be a void in knowledge. This paper presents an analytical model to predict the settling rates of nano-to-micro size particulate systems. The model was developed as a combination of modified classical equations and graphical methods. A calculation sequence also is presented. By validation with available experimental data for settling nano-to-micro systems, it was found that the two schemes show order of magnitude agreement. A significant feature of this model is its ability to accommodate non-spherical particles and different fractal dimensions.