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This paper investigates the degree of similarity between fluidized beds and bubble columns based on Eulerian‐Eulerian two‐dimensional simulations of an air‐water bubble column and an air‐FCC fluidized bed. Predictions for both systems are compared with available hydrodynamic experimental data, i.e. bed expansion, local axial velocity, local gas hold‐up, and wall pressure fluctuations at different...
In order to predict gas-liquid-solid multiphase mixing effect in the gas-liquid-solid three-phase reactors, a novel method based on image processing technology, fractal dimension and CFD technology is introduced in this work. Each pattern produced by phase transition in the stirred reactor are continuously eroded and binarized five times. Evolution profile of the fractal dimension slope value P of...
Multiphase flow and complex flow regimes of asphalt-base crude oil with solid-state asphalt and gas presenting in submarine pipelines bring difficulty to the design and operation. For multiphase flow in risers, flow regimes are often very complex. So simulation of asphalt-base crude oil flow in vertical riser is presented using 3D Computational Fluid Dynamics and the Volume of Fluid method as a surface...
Deposition of asphaltenes can occur in the tubing, pipelines and surface facilities leading to operational problems and loss in production. Nevertheless, accurate predictions of asphaltene instability have been elusive. Therefore, simulations of oil-gas-water three-phase flow in different structural pipelines are presented using 3D Computational Fluid Dynamics to get the distribution of each phase...
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