Increase of turbulent drag by polymers in particle suspensions
Marco Edoardo Rosti, Luca Brandt
Abstract
Viscoelastic turbulent flows of particle suspensions are studied using direct numerical simulations. In the presence of a moderate concentration of particles, the beneficial effect of polymers in terms of drag reduction are lost, and an increase in drag is observed for sufficiently dense suspensions.
Topics & Concepts
DragTurbulenceParticle (ecology)ViscoelasticityMechanicsPolymerDrag coefficientMaterials scienceClassical mechanicsPhysicsComposite materialGeologyOceanographyRheology and Fluid Dynamics StudiesParticle Dynamics in Fluid FlowsGranular flow and fluidized beds