Particle-size and -density segregation in granular free-surface flows
نویسندگان
چکیده
منابع مشابه
A mixture theory for size and density segregation in shallow granular free-surface flows
In the past ten years much work has been undertaken on developing mixture theory continuum models to describe kinetic sieving-driven size segregation. We propose an extension to these models that allows their application to bidisperse flows over inclined channels, with particles varying in density and size. Our model incorporates both a recently proposed explicit formula for how the total press...
متن کاملA theory for particle size segregation in shallow granular free-surface flows
Granular materials composed of a mixture of grain sizes are notoriously prone to segregation during shaking or transport. In this paper, a binary mixture theory is used to formulate a model for kinetic sieving of large and small particles in thin, rapidly flowing avalanches, which occur in many industrial and geophysical free-surface flows. The model is based on a simple percolation idea, in wh...
متن کاملParticle Size Segregation in Granular Avalanches
When particles with different material properties are segregated by size or density they often have a subtle feedback on the local mobility of the granular material, which can significantly modify the bulk flow. Perhaps the most striking example of this segregation-mobility feedback occurs in geophysical mass flows, such as debris-flows, dense pyroclastic avalanches and snow avalanches. Larger ...
متن کاملParticle Dynamic Simulation of Free Surface Granular Flows
A large collection of particles can behave collectively like a fluid. In this work, we examine the fluid behavior of a large collection of particles in the absence of a background gas phase. The use of granular fluids, as opposed to liquids, has several advantages for free-surface plasma-facing coolants: low vapor pressure, absence of electromagnetic interactions, and chemical inertness, to nam...
متن کاملIncompressible smoothed particle hydrodynamics simulations on free surface flows
The water wave generation by wave paddle and a freely falling rigid body are examined by using an Incompressible Smoothed Particle Hydrodynamics (ISPH). In the current ISPH method, the pressure was evaluated by solving pressure Poisson equation using a semi-implicit algorithm based on the projection scheme and the source term of pressure Poisson equation contains both of divergence free ve...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Fluid Mechanics
سال: 2015
ISSN: 0022-1120,1469-7645
DOI: 10.1017/jfm.2015.438