Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Superficial velocities"”.
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Development of High-Speed Camera Techniques for Droplet Measurement in Annular Flows
… diameter tube. The conditions tested include gas superficial velocities ranging from 22 to 40 m/s and liquid superficial velocities ranging from 0.09 to 0.44 m/s. The measured flow has a temperature of 21°C and a pressure of 1 atm.
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STUDY OF THREE-PHASE AIR-BRINE-SALT COUNTERFLOW IN AN INCLINED PIPE
… salt particles. A wide range of gas and liquid superficial velocities were tested. High-speed and standard-speed video recordings, pressure, and fluid level measurements were used to analyze flow regimes, bubble characteristics (length, velocity, depth, frequency), void fraction, and solid …
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Flow patterns in upward two-phase flow in small diameter tubes
… were 6, 10 and 14 bar; the liquid and gas superficial velocities covered a range of 0.04-5.0 m/s and 0.01-10.0 m/s respectively. The observed flow patterns included bubbly, dispersed bubble, confined bubble, slug, chum, annular and mist flow. Twelve integrated flow maps are sketched in this …
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CFD modelling of flow-induced vibration under multiphase flow regimes.
… fraction, forces and stress as functions of gas superficial velocities in the 0.0525m I.D. pipe showed a good correlation to the observed behaviours in the 0.2032m I.D. pipe. The same correlation was not prominent in the 0.1016m I.D. pipe and was attributed to the transition behaviour of …
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Biological Aerated Filters: Oxygen Transfer and Possible Biological Enhancement
… were found to increase as both gas and liquid superficial velocities increase, with values ranging from approximately 40 to 380 h??. The effect of parameters including the gas and liquid velocities, dirty water to clean water ratio, and temperature dependence was successfully correlated within …
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Integrated multiphase flow modeling in wellbore for downhole pressure predictions
… angle, gas density, and liquid and gas superficial velocities on liquid holdup and pressure gradient. With the improved two-fluid model, the new integrated model was completed. Moreover, the new integrated model outperformed the other multiphase flow models in predicting the downhole …
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The effect of flow regimes in the distillation of systems containing two liquid phases
… Entrainment was more severe for high gas superficial velocities and large hole diameters. This behaviour is quite different from the build up of foam observed when one liquid phase/two liquid phase Ross systems were contacted with air above a small sintered disc or with vapour in an …
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Effects of flow orientation on condensation in tubes
… in a flow regime map based on dimensionless superficial velocities of the vapor and liquid. The condensation heat transfer coefficient is shown to decrease axially because of gradual thickening of the film, except for high mass velocities, where turbulence and intensified interfacial waviness …
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Development of a hybrid ion exchange-catalyst system to denitrify ion exchange waste brine
… and evaluated across a range of liquid and gas superficial velocities. Synthetic waste brines were treated with two Pd-In/AC catalysts that had different support sizes. In comparison to a previously tested up-flow fixed-bed reactor, the same catalyst in the TBR demonstrated c. 300% higher …