Simulation of large amplitude waves in a slug tracking scheme compared to roll wave experiments at high pressure

Leebeeck, Angela De; Nydal, Ole Jørgen

doi:10.1016/j.ijmultiphaseflow.2009.09.002

Cited by 14 publications

(5 citation statements)

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“…Similarities between slugs and roll waves such as a propagating front and a sloping tail have been observed experimentally in, for example, Johnson [8]. Pressure variations across wave fronts similar to slugs have also been measured (De Leebeeck et al [4]). These experiments are used to develop a wave model including the observed pressure variation.…”

Section: Introductionmentioning

confidence: 66%

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Large amplitude waves in a slug tracking scheme

Leebeeck¹,

Nydal²

2009

Computational Methods in Multiphase Flow V

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Large amplitude roll waves are incorporated into a previously developed slug tracking scheme for two phase gas-liquid pipe flow. The applicability of the tracking scheme to large amplitude waves is demonstrated with a simplified model for the waves. The waves are modelled analogous to slugs on a moving grid with corresponding wave velocities and a pressure variation determined using an orifice type relation. Slugs and waves in the tracking scheme are separated by regions of stratified flow, which are modelled on a stationary grid using the two-fluid model. The computational scheme is described, compared to experimental data on roll waves, and some wave dynamics such as waves developing to slugs and slugs decaying to waves are demonstrated.

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Section: Introductionmentioning

confidence: 66%

“…pipe using air and water at atmospheric pressure (De Leebeeck et al [4]). The experiments included pipe inclinations from -1 to 3 degrees, Usg from 2 to 11.5 m/s, and Usl from 0.04 to 0.52 m/s where a mixture of waves and slugs occurred.…”

Section: Resultsmentioning

confidence: 99%

Large amplitude waves in a slug tracking scheme

Leebeeck¹,

Nydal²

2009

Computational Methods in Multiphase Flow V

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“…Some computational examples with a hybrid scheme are presented below. This is an extension of a simplified slug tracking scheme. − A hybrid scheme includes both capturing (for evolution of liquid slugs) and tracking (for the subsequent slug dynamics).…”

Section: Resolve All Scales (Capturing and Tracking Methods)mentioning

confidence: 99%

Dynamic Models in Multiphase Flow

Nydal

2012

Energy Fuels

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Transport of oil and gas mixtures in pipelines involves flow dynamics on a wide range of time and length scales. Liquid slugs and waves occur at scales extending from diameters ("hydrodynamic slug flow") and up to riser lengths ("severe slugging"). The approach in one-dimensional dynamic multiphase flow models for analysis of flow dynamics depends upon the scale to be resolved. Types of models are discussed, and a hybrid two-fluid model and a slug tracking model are in particular described. A two-fluid model is applied on a stationary grid in the gas−liquid stratified flow region until a slug is formed (or initiated), when a slug tracking method with a moving grid takes over. The performance of the model is demonstrated in relation to three types of cases with different time and length scales: Two-and three-phase severe slugging, hydrodynamic slugging after a bend, and a pigging case to simulate the rapid release of a hydrate plug. The computations are compared to experimental laboratory data.

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“…In regard to the method principle, some ideas have been drawn from the work of De Leebeeck and Nydal [6]. They presented a phenomenological model treating large waves as a fixed-length choke object and used object oriented programming to simulate intermittent occurrences of such wave representations.…”

Section: Reviewmentioning

confidence: 99%

A Method of Chained Analytical Wave Structures for Large Scale Stratified Two-Phase Pipe Flows

Akselsen¹

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Abstract. Pipeline transport systems can span vast distances, making finely resolved simulation techniques computationally unaffordable. This article examines the use of analytical steady wave solutions in a dynamic simulation framework as a technique for obtaining physical wave dynamics in a flow regime simulator without discretising individual wave structures. A scheme based on this principle is presented wherein a family of steady roll-waves profile solutions is generalised to allow for a dynamic profile evolution. These solutions are then implemented into a finite volume scheme where a wave solution constitutes a single dynamic grid cell. Waves interact dynamically to construct a wave regime evolving in time. Predictions on flow development are compared with finely resolved direct numerical simulations on fixed grids. Steady wave solutions, once subjected to coordinate stretching, behaves appropriately in the dynamic frame, predicting the regime development in time, the wave coalescences and the final steady state or slug transition. 806A.H. Akselsen

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Simulation of large amplitude waves in a slug tracking scheme compared to roll wave experiments at high pressure

Cited by 14 publications

References 14 publications

Large amplitude waves in a slug tracking scheme

Large amplitude waves in a slug tracking scheme

Dynamic Models in Multiphase Flow

A Method of Chained Analytical Wave Structures for Large Scale Stratified Two-Phase Pipe Flows

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