Theory for size segregation in flowing granular mixtures based on computation of forces on a single large particle
Anurag Tripathi, Alok Kumar, Mohit Nema, D. V. Khakhar
Abstract
We measure the upward force acting on a single, unconstrained, large particle in a granular medium of small particles flowing over inclined plane using discrete element method (DEM) simulation. Based on the computed force, we obtain an expression for the flux of large particles in a binary mixture of large and small particles and predict the equilibrium concentration profile and the velocity profile of the flowing layer. The theoretical predictions are in very good agreement with the DEM simulation results for a wide range of concentrations of large particles and inclination angles.
Topics & Concepts
Discrete element methodParticle (ecology)Inclined planeRange (aeronautics)ComputationMechanicsGranular materialPlane (geometry)Particle sizeBinary numberMaterials scienceFlux (metallurgy)PhysicsClassical mechanicsComposite materialGeometryChemistryComputer scienceMathematicsAlgorithmArithmeticOceanographyMetallurgyPhysical chemistryGeologyQuantum mechanicsGranular flow and fluidized bedsLandslides and related hazardsSoil and Unsaturated Flow