Particle motion nearby rough surfaces

Prediction of particle deposition on to rough surfaces

Lagrangian stochastic models applicable to the prediction of particle deposition onto hydraulically smooth surfaces are extended to account for the effects of surface roughness. Within the modelling approach, roughness elements are treated as mass ‘sinks’ volumetrically distributed within the flows. The extreme sensitivity of the deposition of micron and sub-micron sized particles to the micro-...

Modeling Rough Surfaces

Avalanches at rough surfaces.

We describe the surface properties of a simple lattice model of a sandpile that includes evolving structural disorder. We present a dynamical scaling hypothesis for generic sandpile automata and, additionally, explore the kinetic roughening of the sandpile surface, indicating its relationship with the sandpile evolution. Finally, we comment on the surprisingly good agreement found between this ...

modeling of controlled particle deposition on to electronically conducting surfaces

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Scattering on Multiscale rough surfaces

We present a method to recover a fractal dimension of a multi-scale rough surface, the so-called correlation dimension, from the knowledge of the far-field scattered intensity. The results are validated by numerical experiments on Weierstrass-like surfaces.