Turbulent flow of hydrates in a pipeline of complex configuration

Balakin, Boris V.; Hoffmann, Alex C.; Kosinski, Pawel; Høiland, Sylvi

doi:10.1016/j.ces.2010.06.005

Cited by 33 publications

(9 citation statements)

References 22 publications

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“…The turbulent viscosity concept is used to account for the turbulent behaviour of the flow. The parameter is set to be proportional to the turbulent kinetic energy k and the rate of the energy dissipation ε (see, for example, [3]):…”

Section: Model Descriptionmentioning

confidence: 99%

Computational Study of Two-Phase Flow Morphology in a Nozzle

Balakin¹,

Kuzmenkov²,

Kutsenko³

et al. 2018

KEG

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Multiphase flow meters are widely used in nuclear, petroleum and chemical industries. Here the flow rate is defined indirectly by the differential pressure measurement over the device. An additional measurement is required to estimate average density of the phase mixture. This could be done by means of the gamma-ray, electromagnetic or acoustic tomography. The accuracy of the technique is dependent on flow morphology. The present paper reports the results of CFD-modelling of the gas-liquid flow through the vertical flow meter accompanied by a flow conditioner. The model is used to consider the morphology for three different combinations of liquid and gas flow rates. The model demonstrates high non-uniformities of the flow field at the entrance of the flow meter and generally confirms the agreement of flow morphology with previous experimental observations for vertical pipes.

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Section: Model Descriptionmentioning

confidence: 99%

Computational Study of Two-Phase Flow Morphology in a Nozzle

Balakin¹,

Kuzmenkov²,

Kutsenko³

et al. 2018

KEG

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show abstract

“…Immediately behind the leading decompression wave, the local decompression wave velocity is equal to local speed of sound minus the local escaping out flow velocity, shown in Eqn (19). Immediately behind the leading decompression wave, the local decompression wave velocity is equal to local speed of sound minus the local escaping out flow velocity, shown in Eqn (19).…”

Section: Discrepancies the Influence Increases For Smaller C Values mentioning

confidence: 99%

“…When a pipeline rupture occurs, a leading decompression wave propagates away from the rupture plane into the undisturbed compressed fluid at the local speed of sound. Immediately behind the leading decompression wave, the local decompression wave velocity is equal to local speed of sound minus the local escaping out flow velocity, shown in Eqn (19). The decompression curve (decompression wave velocity as a function of pressure) is an important factor for fracture control analysis according to BTCM.…”

Section: Discrepancies the Influence Increases For Smaller C Values mentioning

confidence: 99%

“…[19][20][21][22][23] The majority of multi-phase pipeline decompression models reported in the literature have utilized the Homogeneous Equilibrium Model (HEM), 24,25 in which the constituent phases areassumed to be in thermal and mechanical equilibrium throughout the phase change process. [19][20][21][22][23] The majority of multi-phase pipeline decompression models reported in the literature have utilized the Homogeneous Equilibrium Model (HEM), 24,25 in which the constituent phases areassumed to be in thermal and mechanical equilibrium throughout the phase change process.…”

Section: Introductionmentioning

confidence: 99%

“…18 These models are also based on In recent times, CFD has been increasingly employed to investigate multi-phase pipe flow. [19][20][21][22][23] The majority of multi-phase pipeline decompression models reported in the literature have utilized the Homogeneous Equilibrium Model (HEM), 24,25 in which the constituent phases areassumed to be in thermal and mechanical equilibrium throughout the phase change process. Specifically, in HEM, the two phases share the same temperature and pressure on the saturation line.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multi‐phase decompression modeling of CO₂ pipelines

Liu

Lü

et al. 2017

Greenhouse Gases

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Carbon capture and storage (CCS) is a technology that has been proposed to reduce what are perceived to be excessive concentrations of carbon dioxide (CO2) in the atmosphere. CCS will require the transportation of CO2 from the capture locations to the storage sites via pipelines. To ensure safety, an accurate prediction of CO2 decompression following pipeline fracture is crucial for the design and operation for these projects. A multi‐phase CO2 pipeline decompression model using computational fluid dynamics (CFD) techniques is presented in this paper. The GERG‐2008 equation of state (EOS) is employed to describe the properties of vaporand liquid phases. A phase change model using a mass transfer coefficient to control the inter‐phase mass transfer rateis implemented into the CFD code. By varying the mass transfer coefficient, the effect of delayed nucleation on the decompression wave speed can be investigated. The proposed multi‐phase CFD decompression modelis validated against the experimental data from a shock tube test. The performance of the proposed model is also compared with that of the Homogeneous Equilibrium Model (HEM). In addition, the influence of delayed nucleation on CO2 decompression characteristics is discussed and an optimum mass transfer coefficient for CO2 depressurization is obtained. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Experimental and computational study of the “end of the vortex” phenomenon in reverse‐flow centrifugal separators

et al. 2011

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The “end of the vortex” (EoV) phenomenon, a flow instability that plays a crucial role in cyclone design and operation is studied in this article. In the experimental part of the study, tests were carried out to understand the origin and nature of the EoV and to study the effects of the flowrate through, and the length of, the cylindrical cyclone on the EoV. In the theoretical part, computational fluid dynamics (CFD) models, in agreement with the geometrical configurations and operating conditions used in the present and earlier experimental studies, were constructed and investigated. Three‐dimensional simulations were carried out using the large eddy turbulence model with the commercial CFD package Star‐CD. Bending of the vortex core to the wall of the vessel and its precessional motion, constituting the phenomenon of the EoV, was observed in the simulations in most geometries. The results are in a good agreement not only with the present experimental results but also with previous experimental observations. © 2011 American Institute of Chemical Engineers AIChE J, 2012

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Turbulent flow of hydrates in a pipeline of complex configuration

Cited by 33 publications

References 22 publications

Computational Study of Two-Phase Flow Morphology in a Nozzle

Computational Study of Two-Phase Flow Morphology in a Nozzle

Multi‐phase decompression modeling of CO₂ pipelines

Experimental and computational study of the “end of the vortex” phenomenon in reverse‐flow centrifugal separators

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Turbulent flow of hydrates in a pipeline of complex configuration

Cited by 33 publications

References 22 publications

Computational Study of Two-Phase Flow Morphology in a Nozzle

Computational Study of Two-Phase Flow Morphology in a Nozzle

Multi‐phase decompression modeling of CO2 pipelines

Experimental and computational study of the “end of the vortex” phenomenon in reverse‐flow centrifugal separators

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Product

Resources

About

Multi‐phase decompression modeling of CO₂ pipelines