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Prediction of Flow Behavior of Liquid and Particles in Liquid-Solid Risers with Modified Cluster Structure-Dependent Drag Method
A modified cluster structure-dependent (CSD) drag coefficient model is employed to investigate the effects of flow structure on the determination of drag coefficient from the multi-scale aspect by taking momentum and energy balance of dense phase dilute phase into account. The proposed modified model of CSD drag coefficient is on the basis of transportation and suspension energy-minimization method by heterogeneous drag. The modified drag coefficient closure considers flow behavior of both liquid and particles on the wall. Implementation of the calculation was done from the approach of the energy dissipation minimization incorporating into the two-fluid model to simulate the behavior of liquid-particle flow in a riser. The flow behavior of particles is predicted to be affected by the solid down-flow near the walls of the riser in the cluster formations and the wall friction of particles results in an increase of the concentration of particles near the walls. The predicted concentration and axial velocity of particles inside the riser compared reasonably well with experimental data.
Prediction of Flow Behavior of Liquid and Particles in Liquid-Solid Risers with Modified Cluster Structure-Dependent Drag Method
A modified cluster structure-dependent (CSD) drag coefficient model is employed to investigate the effects of flow structure on the determination of drag coefficient from the multi-scale aspect by taking momentum and energy balance of dense phase dilute phase into account. The proposed modified model of CSD drag coefficient is on the basis of transportation and suspension energy-minimization method by heterogeneous drag. The modified drag coefficient closure considers flow behavior of both liquid and particles on the wall. Implementation of the calculation was done from the approach of the energy dissipation minimization incorporating into the two-fluid model to simulate the behavior of liquid-particle flow in a riser. The flow behavior of particles is predicted to be affected by the solid down-flow near the walls of the riser in the cluster formations and the wall friction of particles results in an increase of the concentration of particles near the walls. The predicted concentration and axial velocity of particles inside the riser compared reasonably well with experimental data.
Prediction of Flow Behavior of Liquid and Particles in Liquid-Solid Risers with Modified Cluster Structure-Dependent Drag Method
Liu, G. D. (author) / Lu, H. L. (author) / Wang, S. (author) / Sun, L. Y. (author)
Fifth Biot Conference on Poromechanics ; 2013 ; Vienna, Austria
Poromechanics V ; 1047-1056
2013-06-18
Conference paper
Electronic Resource
English
Wave propagation , Poroelasticity , Velocity , Mechanics , Simulation , Porous media , Predictions , Liquids , Porosity , Particles
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