Simultaneous velocimetry/accelerometry measurements in a turbulent two-phase pipe flow

Borowsky, Joseph; Wei, Timothy

doi:10.1007/s00348-006-0138-5

Cited by 14 publications

(5 citation statements)

References 14 publications

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“…Magnetic flow meters (Cushing, 1964) (Sorrell, 1990) and hot-wire anemometers (Lock , 1968) (Tsuji, 1989) have been used extensively in the past, but only offer average and local velocity data, respectively. Various optical techniques with sufficient time resolution have been developed such as Laser Doppler Velocimetry (LDV) (Porta, 2002) (Hosokawa, 2009) and Particle Image Velocimetry (PIV) (Borowsky, 2006) (Deev, 2009) and are in common use today. Radiographic techniques have also been used for visualization of two-phase fluid flows encased in opaque materials such as pipes and containers (Koster, 1997).…”

Section: Development Ins Measurement Methodsmentioning

confidence: 99%

Data Collection Methods for Validation of Advanced Multi-Resolution Fast Reactor Simulations

Tokuhiro¹,

Ruggles²,

Pointer³

2015

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In pool-type Sodium Fast Reactors (SFR) the regions most susceptible to thermal striping are the upper instrumentation structure (UIS) and the intermediate heat exchanger (IHX). This project experimentally and computationally (CFD) investigated the thermal mixing in the region exiting the reactor core to the UIS. The thermal mixing phenomenon was simulated using two vertical jets at different velocities and temperatures as prototypic of two adjacent channels out of the core. Thermal jet mixing of anticipated flows at different temperatures and velocities were investigated. Velocity profiles are measured throughout the flow region using Ultrasonic Doppler Velocimetry (UDV), and temperatures along the geometric centerline between the jets were recorded using a thermocouple array. CFD simulations, using COMSOL, were used to initially understand the flow, then to design the experimental apparatus and finally to compare simulation results and measurements characterizing the flows.

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Section: Development Ins Measurement Methodsmentioning

confidence: 99%

Data Collection Methods for Validation of Advanced Multi-Resolution Fast Reactor Simulations

Tokuhiro¹,

Ruggles²,

Pointer³

2015

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“…where h w is the well depth of water column in m, and q w is the density of water column in kg/m 3 . The coal reservoirs may produce CBM mostly during the phase of single-phase CBM flow (Borowsky and Wei 2006;White and Smith 2012;Tang et al 2016). And hence the CBM wellbores exhibit single-phase flowing performances for at least a portion of their producing process.…”

Section: Flowing Pressures In Single-phase Cbm Wellboresmentioning

confidence: 99%

Dynamic behavior of coalbed methane flow along the annulus of single-phase production

Liu

Liu³

2019

Int J Coal Sci Technol

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Dynamic behavior of coalbed methane (CBM) flow will provide the theoretical basis to optimize production performance for a given well. A mathematical model is developed to simulate flowing pressures and pressure drops of CBM column from well head to bottom hole. The measured parameters and independent variables of flow rates, flowing pressures and temperatures are involved in CBM producing process along the annulus. The developed relationships are validated against full-scale measured data in single-phase CBM wellbores. The proposed methodology can analyze the dynamic behavior in CBM reservoir and process of CBM flow with an overall accuracy of 2%. The calculating process of flowing pressures involves friction factor with variable Reynolds number and CBM temperature and compressibility factor with gravitational gradients. The results showed that the effect of flowing pressure on CBM column was more obvious than that on CBM and water column accompanied by an increase of dynamic water level. The ratios of flowing pressure on increment of CBM column to the whole column increased with the declined flow rates of water column. Bottom-hole pressure declined with the decreased flowing pressure of CBM column along the annulus. It will lead to the results of the increased pressure drop of CBM column and CBM flow rate in single-phase CBM wellbores.

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“…For the CBM and water flow wellbores, the energy balance equation can be modified to include the two-phase (CBM and water) flow [27,28]. The following energy balance equation for the computation of CBM and water column pressure can be expressed as follows:…”

Section: Model Development Of Cbm and Water Flowmentioning

confidence: 99%

A Modern Approach to Analyzing the Flowing Pressures of a Two-Phase CBM and Water Column in Producing Wellbores

Liu

Wu³

2019

Geofluids

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A modern methodology is presented for the system analysis of flowing pressures in order to forecast the dynamic behavior and solve the forthcoming problems that emerge in two-phase coalbed methane (CBM) wellbores. The proposed methodology involves a numerical integration technique to calculate flowing pressures and pressure drops of CBM and water flow from the bottom hole to the well head. The methodology is validated against full-scale measured data in coalfields. The relationships developed match CBM reservoir behavior and wellbore conditions along the annulus with an overall accuracy of 1.13%. The computation of flowing pressures involves a liquid holdup and kinetic energy term with flow rate increments, a compressibility factor with depth increments, and a friction factor with Reynolds number. The flowing pressures of a two-phase column fully reflect the dynamic flowing performance due to the combined action of the water level, CBM, and water flow rates. The effect of CBM and water column pressures is more obvious than that of CBM column pressures. The pressure ratios of CBM and the water column to the bottom hole decline rapidly with the increase of the dynamic water level. CBM and water flow rates can be improved with increases in CBM and water column pressure for two-phase producing wellbores. The decrease of flowing pressures and increased increment of the pressure drop for the two-phase column are beneficial to CBM desorption and result in the increased CBM and water production. It will control the falling speed of the dynamic water level above CBM and the water column and enhance CBM reservoir productivity. The increases of CBM and water column pressure from 34.6 kPa to 922 kPa and the decreases of pressure in the bottom hole from 2.252 MPa to 1.328 MPa lead to the increases of the CBM flow rate from 3327 m3/d to 6721 m3/d.

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Simultaneous velocimetry/accelerometry measurements in a turbulent two-phase pipe flow

Cited by 14 publications

References 14 publications

Data Collection Methods for Validation of Advanced Multi-Resolution Fast Reactor Simulations

Data Collection Methods for Validation of Advanced Multi-Resolution Fast Reactor Simulations

Dynamic behavior of coalbed methane flow along the annulus of single-phase production

A Modern Approach to Analyzing the Flowing Pressures of a Two-Phase CBM and Water Column in Producing Wellbores

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