In this work, the GEneralised Multifluid Modelling Approach (GEMMA) is applied to simulation of liquid–liquid extraction in a Rotating Disc Column (RDC) and Pulsed Sieve-plate Extraction (PSEC). A mass transfer modelling methodology developed, which multiphase flows, droplet size distribution dispersed phase holdup predicted with computational fluid dynamics are coupled correlations predict ove...

Solids holdup as one of the main parameters in characterizing performance fluidized bed reactors is widely concerned. With its development and improvement, visualization technology has been applied fluidization because little disturbance to flow. In this study, four types particles with different properties are tested a narrow rectangular equipped high-speed video camera. Calibration curves the...

odels of bilateral contracting, such as the canonical holdup model, typically assume that third parties are not available. Given this assumption, the equilibrium outcome is not first-best efficient if contracts can be renegotiated. To be more specific, suppose an architect and a builder must cooperate to build a building. The quality of the building will depend on three things: the quality of t...

In this work, CFD simulations of an air-water bubbling column were performed and validated with experimental data. The superficial gas velocities used for the experiments were 0.019 and 0.038 m/s and were considered as an homogeneous regime. The former involves simpler physics when compared to a heterogeneous regime where the superficial velocities are higher. In order to simulate the system, a...

Opaque Multiphase Reactors: Experimentation, Modeling and Troubleshooting — Multiphase reactors are widely used in petroleum, chemical, petrochemical, pharmaceutical and metallurgical industries as well as in materials processing and pollution abatement. Most reactors of interest in industrial practice (slurry bubble columns, gas-solid risers and fluidized beds, ebullated beds and stirred tanks...

Estimating the oil-water temperatures in flowlines is challenging especially deepwater and ultra-deepwater offshore applications where issues of flow assurance dramatic heat transfer are likely to occur due temperature difference between fluids surroundings. Heat analysis very important for prediction prevention deposits oil water flowlines, which could impede give rise huge financial losses. T...