The modelling of agglomerating systems is demonstrated by focusing on processes where liquid binder provides the dominant adhesion force between particles. Current theories, developed from the classic pendular bridge force expressions, are still restricted to using empirical parameters to apply the pair-wise forces to multi-particle agglomerates. However, the use of contact mechanics, coupled with such models, is proving to yield useful information on the deformation and breakage behaviour of agglomerates, which in turn will apply to overall growth behaviour. Advances are also being made in computer simulations which can incorporate these theories. Recent advances in the concepts of fractal analysis to provide quantitative information on the openness of agglomerate structures (from which qualitative information on the growth mechanisms can be inferred) are described. Here, too, the use of computational techniques, such as image analysis, is enhancing our ability to make comprehensive measurements of agglomeration phenomena, from which new models can be developed to improve the design and operation of process equipment.