Massively parallelized models of fluid-solid multiphase flow

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A key problem in environmental and industrial fluid dynamics is the ability to efficiently numerically model the transport of particulate material within a flow coupled with aggradation and/or erosion of stationary particulate material from boundaries (e.g. sediment bed). This challenge has remained largely unresolved as particle transport is controlled by the small-scale processes of turbulent flow whilst the system scales of interest may be many orders of magnitude larger. Examples include: sediment transport in environmental flows, from mountain rivers to deep oceans; wastewater transport in pipes; combustion dynamics; and chemical and pharmaceutical production. In environmental systems, in particular, hydrodynamics of the flow (e.g. rivers, estuaries, coasts etc.) are dependent on the morphodynamics of the bed. Understanding of the coupling between hydro- and morphodynamics is essential in land and marine use management and geohazard prediction and mitigation. In this research project, an in-house Lattice Boltzmann Method (LBM) code, which was written to run on massively parallel Graphics Processing Units (GPUs), will be further developed to study multiphase fluid-solid flows with environmental context.