From nearly homogeneous to core-peaking suspensions: Insight in suspension pipe flows using MRI and DNS
Willian Hogendoorn, Wim-Paul Breugem, D.J. Frank, Martin Bruschewski, Sven Grundmann, Christian Poelma
Abstract
Semi-dilute to dense particle-laden inertial pipe flows are studied using magnetic resonance imaging in conjunction with direct numerical simulations. In general, both methods show an excellent agreement for both the time-averaged velocity and concentration profiles. Different flow regimes are identified based on the experimental and numerical data. For higher solid volume fractions a core-peaking concentration distribution is found that explains the observed drag decrease relative to the drag expected for a uniform concentration distribution.
Topics & Concepts
DragMechanicsSuspension (topology)HomogeneousInertial frame of referenceCore (optical fiber)Materials scienceParticle (ecology)Flow (mathematics)Resonance (particle physics)PhysicsThermodynamicsClassical mechanicsGeologyMathematicsComposite materialAtomic physicsPure mathematicsOceanographyHomotopyParticle Dynamics in Fluid FlowsHydrology and Sediment Transport ProcessesGranular flow and fluidized beds