Fluid dynamics of bubble columns at elevated temperature modelling and investigation with refractive fiber optic sensors

Chabot, J.; Farag, Hamed; Lasa, Hugo de

doi:10.1016/s0923-0467(98)00075-x

Cited by 13 publications

(3 citation statements)

References 18 publications

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“…Since the probe is a single point measurement like a thermocouple, data is analysed statistically over a period of time to generate the timeaveraged multiphase parameters (e.g., void fraction, interfacial area concentration, and interfacial velocity). Being the nature of the device, optical probes are unable to determine bulk parameters unless operating in steady state conditions and multiple measurements are required to be strategically placed at different locations (Chabot et al, 1998;Choi and Lee, 1990).…”

Section: Review Of Measuring Methods For Two-phase Flowmentioning

confidence: 99%

Thermal hydraulic considerations of nuclear reactor systems: Past, present and future challenges

Yeoh

2019

Exp. Comput. Multiph. Flow

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Thermal hydraulic analysis of nuclear reactor core and its associated systems can be performed using analysis system, subchannel or computational fluid dynamics (CFD) codes to estimate the different thermal hydraulic safety margins. The safety margins and operating power limits under different conditions of the primary as well as secondary cooling system such as the system pressure, coolant inlet temperature, coolant flow rate, and thermal power and its distributions are considered as key parameters for thermal hydraulic analysis. Considering the complexity of rod bundle geometry, boiling heat transfer and different turbulent scales bring about the many challenges in performing the thermal hydraulic analysis to ensure the safe design and operation of nuclear reactor systems under normal and abnormal conditions. A comprehensive review is presented of past, present and future challenges in state-of-the-art thermal hydraulic analysis covering various aspects of experimental, analytical and computational approaches.

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Section: Review Of Measuring Methods For Two-phase Flowmentioning

confidence: 99%

Thermal hydraulic considerations of nuclear reactor systems: Past, present and future challenges

Yeoh

2019

Exp. Comput. Multiph. Flow

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“…The oil droplets and oil-coated solids rise to the surface where they are trapped in the resulting foam/scum and removed from the flotation chamber when the foam/scum is skimmed off (Strickland, 1980;Kitchener, 1985;Arnold and Stewart, 1998;Moosai and Dawe, 2002;Movafaghian et al, 2004). The internals of flotation cells such as nozzles, rotors, baffles, and foam/scum skimmers for these units are patented designs and still are not well understood (Chabot et al, 1998;Arnold and Stewart, 2008).…”

Section: Induced Gas Flotationmentioning

confidence: 99%

The Effect of Temperature and Impeller Speed on Mechanically Induced Gas Flotation (IGF) Performance in Separation of Oil from Oilfield-Produced Water

Mastouri¹,

Borghei²,

Nadim³

et al. 2010

Petroleum Science and Technology

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The effect of temperature and impeller speed on the performance of induced gas flotation (IGF) systems for the removal of oil from produced water in different ranges (5-300 g/L) of total dissolved solids (TDS) was investigated in a pilot plant study. Furthermore, it was evaluated whether the IGF pilot plant effluent could reach the 15 mg/L outlet oil content as required by Article VI of the Kuwait Convention for Persian Gulf region, before being discharged to the sea. The results showed that oil removal efficiencies up to 90% could be reached at high temperature (80 ı C) in just one single flotation cell without adding any chemicals. Flotation unit, however, should be followed by at least one more flotation cell in series in order to guarantee the Kuwait Convention marine pollution discharge standard for the effluent oil content.

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“…The bre usually ends with a thin conical tip to correctly pierce bubbles. Following optic laws, this tip transmits the light beam when in liquid medium, or reects it back (towards the electronic device) when it is surrounded by gas (Chabot, Farag, & De Lasa, 1998;Choi and Lee, 1990). An opto-electronic device (pho- Fig.…”

Section: Principlementioning

confidence: 99%

Measuring Techniques in Gas—Liquid and Gas—Liquid—Solid Reactors

Boyer¹,

Duquenne²,

Wild³

2003

ChemInform

119

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This article oers an overview of the instrumentation techniques developed for multiphase ow analysis either in gas/liquid or in gas/liquid/solid reactors. To characterise properly such reactors, experimental data have to be acquired at dierent space scale or time frequency. The existing multiphase ow metering techniques described give information concerning reactor hydrodynamics such as pressure, phases holdups, phases velocities, ow regime, size and shape of dispersed inclusions, axial diusion coecients. The measuring techniques are presented in two groups: the non-intrusive techniques that deliver global, cross-section-averaged or local data, and the intrusive probes that are dedicated to local measurements. Eventually some examples of multiphase instrumentation development are reported (trickle-bed and slurry bubble column at semi-industrial scale) in the renery or petrochemical area.

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Fluid dynamics of bubble columns at elevated temperature modelling and investigation with refractive fiber optic sensors

Cited by 13 publications

References 18 publications

Thermal hydraulic considerations of nuclear reactor systems: Past, present and future challenges

Thermal hydraulic considerations of nuclear reactor systems: Past, present and future challenges

The Effect of Temperature and Impeller Speed on Mechanically Induced Gas Flotation (IGF) Performance in Separation of Oil from Oilfield-Produced Water

Measuring Techniques in Gas—Liquid and Gas—Liquid—Solid Reactors

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