Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"granular rheology"”.
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Microscopic description of the granular fluidity field in nonlocal flow modeling
A recent granular rheology based on an implicit 'granular fluidity' field has been shown to quantitatively predict many nonlocal phenomena. However, the physical nature of the field has not been identified. Here, the granular fluidity is found to be a kinematic variable given by the velocity …
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Developing a mechanistic model for flow through a perforated plate with application to screening of particulate materials
… based understanding of the behaviour of the granular system. To go beyond the current state-of-the-art in screen modelling requires a clear understanding of the particle motion along a dynamic (vibrating) inclined plane. Central to this understanding is the notion that granular systems …
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Inference and Entropy in Free-Surface Flows
… the particle-particle interactions within a granular flow can be modelled by simple collision mechanics. However, the computational effort required to solve these equations can often render numerical modelling intractable as modellers must either resolve all scales of the velocity field or …
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Photoelastic study of dense granular free-surface flow rheology and size segregation
… challenges facing experimental studies of granular rheology is the opacity of the constitutive particles, which prevents direct observations of their behaviour and interactions. This thesis describes a series of original experiments where instantaneous forces between individual particles …
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Granular flow modelling of rotating drum flows using positron emission particle tracking
Tumbling mills are characterized by a flowing granular mixture comprising slurry, ore and grinding media. Akin to fluid flow, a rheological description underpinning granular flow has long been expected and pursued by many researchers. Unfortunately, no single theory has hitherto been able to …
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Investigating multi-directional inhomogeneous granular suspensions
Granular flows in rotating drums find many applications in industry, even though the dynamics of their granular media is not fully understood. Several models of granular flow and granular suspensions (where a viscous fluid is present in the voids between the granular particles) have been proposed …
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Spreading of viscous fluids and granular materials on slopes
… on effects of the topography, the volume and the rheology of the flowing structure. Numerous different problems are investigated through mathematical models, which are developed analytically and confirmed by laboratory experiments. The initial advance of long lava flows is studied by considering …