A non-intrusive probe for bubble profile and velocity measurement in horizontal slug flows

Reis, Emerson dos; Goldstein, Leonardo

doi:10.1016/j.flowmeasinst.2005.03.003

Cited by 31 publications

(3 citation statements)

References 21 publications

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“…Again, it is apparent that our experimental demonstration refers to the largest diameter ever reported. Moreover, our electrodes are the longest among pipe sensing [ 31 , 32 , 33 , 34 ] and, despite the larger diameter, offer a good sensitivity (133 pF/m) in line with the best-performing ones. As discussed in the literature [ 31 , 33 ], guard electrodes can be flanked to the sensing electrode to improve the measurement accuracy by shaping a more uniform electric field and thus reducing the fringing and parasitic coupling effects at the edges.…”

Section: Discussionmentioning

confidence: 81%

Contactless Sensing of Water Properties for Smart Monitoring of Pipelines

Riboldi

Crafa

Carminati

2023

Sensors

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A key milestone for the pervasive diffusion of wireless sensing nodes for smart monitoring of water quality and quantity in distribution networks is the simplification of the installation of sensors. To address this aspect, we demonstrate how two basic contactless sensors, such as piezoelectric transducers and strip electrodes (in a longitudinal interdigitated configuration to sense impedance inside and outside of the pipe with potential for impedimetric leak detection), can be easily clamped on plastic pipes to enable the measurement of multiple parameters without contact with the fluid and, thus, preserving the integrity of the pipe. Here we report the measurement of water flow rate (up to 24 m3/s) and temperature with ultrasounds and of the pipe filling fraction (capacitance at 1 MHz with ~cm3 resolution) and ionic conductivity (resistance at 20 MHz from 700 to 1400 μS/cm) by means of impedance. The equivalent impedance model of the sensor is discussed in detail. Numerical finite-element simulations, carried out to optimize the sensing parameters such as the sensing frequency, confirm the lumped models and are matched by experimental results. In fact, a 6 m long, 30 L demonstration hydraulic loop was built to validate the sensors in realistic conditions (water speed of 1 m/s) monitoring a pipe segment of 0.45 m length and 90 mm diameter (one of the largest ever reported in the literature). Tradeoffs in sensors accuracy, deployment, and fabrication, for instance, adopting single-sided flexible PCBs as electrodes protected by Kapton on the external side and experimentally validated, are discussed as well.

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Section: Discussionmentioning

confidence: 81%

Contactless Sensing of Water Properties for Smart Monitoring of Pipelines

Riboldi

Crafa

Carminati

2023

Sensors

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“…One major benefit of capacitive sensing is that it is not obtrusive and does not cause any disruptions to the flow regime [12]. To gather hold-up measurements or tomographic reconstructions, capacitance-based sensors have advanced and shown good results for gas-liquid and liquid-liquid flow [13], [14]. Additionally, with regard to the gas-solid system [15].…”

Section: Introductionmentioning

confidence: 99%

A Novel Smart Optimized Capacitance-Based Sensor for Annular Two-Phase Flow Metering With High Sensitivity

et al. 2023

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Accurately determining phase fractions in two-phase flows is among the most significant issues in Industries related to the production and processing of petroleum and petrochemicals. There are numerous sensor types and configurations for measuring the void fraction. In this respect, the capacitance-based sensor is commonly recognized as one of the most precise and widely utilized sensors. In this essay, COMSOL Multiphysics software, which has been benchmarked, was used for simulations with various electrode architectures for measuring oil-air two-phase flow in an annular pattern. The initial electrode configurations were helix, double ring, concave and parallel plates. Finite element analysis utilizing COMSOL Multiphysics was executed to compare the electrode configurations. Results exposed disparate sensitivities for different electrode geometries. To get better results, a new electrode geometry called arrow-shaped which was optimized with Artificial intelligence (AI) was proposed and compared with the others. The sensor responses presented demonstrated that the proposed arrow-shaped capacitance-based sensor had 21% higher sensitivity than the best-performing sensor among four other existing sensor designs, including concave, helix, double ring, and parallel plates. These results indicate the superior performance of the arrow-shaped sensor and its potential for use in high-sensitivity applications.

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“…Nydal et al, [2] used conductance method to determine the mean slug characteristics (hold up, length and velocity) for a large range of gas and liquid velocities in horizontal pipes. Emerson and Leonardo [3] measured the slug velocity of two phase flow in horizontal pipe using the capacitive technique. Gu and Gue [4] conducted Experimental investigation of slug development on horizontal two-phase flow using conductivity probes.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Capability of Acoustic Emission Technology to Determine Slug Velocity in Gas/Water Two Phase Flow in Horizontal Pipes

Alssayh

Husin

Addali

et al. 2013

AMM

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Two phase flow is a common phenomenon that exists in the petroleum and chemical engineering industrial fields. An important feature employed to describe two phase flow is the flow regime which varies depending on the individual velocities of the components within the two-phase flow. One of these regimes, the slug regime, can create significant pressure fluctuations that compromise the integrity of the transporting structure (pipes, separators, etc). This is in addition to other unwanted effects such as flooding at the receiving end, an increase in deposits of hydrates and corrosion. Under such circumstances the detection of the slug and its associated characteristics are vitally important to the operator. This experimental study looks into the application of Acoustic Emission (AE) technology for detecting slug velocity in two phase (gas/liquid) flow. It is verified that slug velocity can be determined by using acoustic emission sensors.

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A non-intrusive probe for bubble profile and velocity measurement in horizontal slug flows

Cited by 31 publications

References 21 publications

Contactless Sensing of Water Properties for Smart Monitoring of Pipelines

Contactless Sensing of Water Properties for Smart Monitoring of Pipelines

A Novel Smart Optimized Capacitance-Based Sensor for Annular Two-Phase Flow Metering With High Sensitivity

Investigating the Capability of Acoustic Emission Technology to Determine Slug Velocity in Gas/Water Two Phase Flow in Horizontal Pipes

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