Computational Fluid Dynamics

The Computational Modelling Group uses Computational Fluid Dynamics (CFD) to study many processes of industrial significance. The group is particularly interested in bridging the gap between the macro and meso scales. This is achieved by coupling novel and efficient stochastic algorithms for the dispersed phase to powerful CFD codes to resolve the continuous phase. In this way, the CoMo Group is able to carry out detailed modelling of particle processes such coalescence and fragmentation occurring in fluids flowing through arbitrarily complicated geometries. The prototypical example is the modelling of droplet coalescence in impinging jets (see Figure), which is important in the large scale modelling of spray dryers, for example.

More generally, the group’s interest is in producing efficient stochastic algorithms for multivariate population balance equations. These are then two-way coupled to a turbulent continuous phase. Considerable computational gains are afforded by bringing this coupling into a general CFD framework. This also enables a wider class of two-phase flow problems to be analysed without the necessity for bespoke code for each geometry under consideration. The CoMo Group has used this strategy to model a liquid-liquid extraction column. Further applications include bubble columns, stirred tanks and air-lift reactors.


Funding has generously been provided by P&G, The Royal Society, The Royal Academy of Engineering, and CD-adapco.