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Nanoparticles have become widely used in a range of applications. For example, in pharmaceuticals, particles on the nanoscale, such as nanocrystals, are often used as an effective means of drug delivery. Meanwhile in material sciences, nanoparticle coating is an increasingly common way to improve or change the properties of materials. Understanding the factors affecting the size of these particles is an important step to develop production processes that optimize the desired particle properties.

This example models the turbulence-induced aggregation of nanoparticles in a beaker fitted with a square blade impeller to predict the size distribution of volume-equivalent spherical particle diameters. The model is set up with a 2D geometry describing the aggregation and movement of particles in a turbulent flow in the mixing plane.