A high spatial and temporal resolution film thickness sensor in oil - water flows

Riaño, Adriana Bonilla; Bannwart, Antonio Carlos; Prasser, Horst-Michael; Dupont, Julien; Rodriguez, Oscar Maurício Hernandez

doi:10.1109/i2mtc.2014.6860522

Cited by 7 publications

(5 citation statements)

References 10 publications

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“…They make use of the relationship between electrical capacity and film thickness. Only a few flow applications of planar sensors on multiphase measurements have been reported in the past (Bonilla Riaño et al, 2014;Thiele et al, 2009). A conductance planar sensor with 64 ϫ 16 measuring points was used for water film thickness measurements in oil-water flows (Bonilla Riaño et al, 2014).…”

Section: Film Thickness Measurements In Liquid-liquid Flowmentioning

confidence: 99%

“…Only a few flow applications of planar sensors on multiphase measurements have been reported in the past (Bonilla Riaño et al, 2014;Thiele et al, 2009). A conductance planar sensor with 64 ϫ 16 measuring points was used for water film thickness measurements in oil-water flows (Bonilla Riaño et al, 2014). The measured water film thickness had between 100 and 700 m. The sensor could not measure the water film when oil had touched the surface sensor before the measurements because oil stuck to the sensor, and produced an isolation effect.…”

Section: Film Thickness Measurements In Liquid-liquid Flowmentioning

confidence: 99%

“…A conductance planar sensor with 64 x 16 measuring points was used for water film thickness measurements in oil-water flows(Bonilla Riaño et al, 2014). The measured water film thickness had between 100µm and 700µm.…”

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confidence: 99%

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Film thickness planar sensor in oil-water flow: prospective study

2015

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Purpose – The purpose of this paper is to study a multiphase-flow instrumentation for film thickness measurement, especially impedance-based, not only for gas–liquid flow but also for mixtures of immiscible and more viscous substances such as oil and water. Conductance and capacitive planar sensors were compared to select the most suitable option for oil – water dispersed flow. Design/methodology/approach – A study of techniques for measurement of film thickness in oil – water pipe flow is presented. In the first part, some measurement techniques used for the investigation of multiphase flows are described, with their advantages and disadvantages. Next, examinations of conductive and capacitive techniques with planar sensors are presented. Findings – Film thickness measurement techniques for oil–water flow are scanty in the literature. Some techniques have been used in studies of annular flow (gas–liquid and liquid–liquid flows), but applications in other flow patterns were not encountered. The methods based on conductive or capacitive measurements and planar sensor are promising solutions for measuring time-averaged film thicknesses in oil–water flows. A capacitive system may be more appropriate for oil–water flows. Originality/value – This paper provides a review of film thickness measurements in pipes. There are many reviews on gas – liquid flow measurement but not many about liquid – liquid flow.

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Section: Film Thickness Measurements In Liquid-liquid Flowmentioning

confidence: 99%

Section: Film Thickness Measurements In Liquid-liquid Flowmentioning

confidence: 99%

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Film thickness planar sensor in oil-water flow: prospective study

2015

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“…A planar sensor is a sensor in which electrodes are placed in a co-planar plane. In Bonilla Riaño et al (2014), a conductance planar sensor with 64 Â 16 measuring points was used for measuring the water film thickness in an oil-water flow. The measured water film thickness was between 100 and 700 m m. In Thiele et al (2009), a capacitive planar sensor is presented to visualize flows of multiphase mixtures along the surface of objects.…”

Section: Introductionmentioning

confidence: 99%

High spatial and temporal resolution film thickness planar sensor: comparison of geometries

Riaño

Peña

Rodriguez

et al. 2019

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Purpose The purpose of this paper is to study planar sensor geometries for the measurement of film thickness in a viscous oil–water flow. The study is relevant due to there are only a few measurement techniques for oil-water flow and these techniques involve oil with low viscosity (close to the water viscosity). Specifically, some techniques have been used in the studies of annular flow (gas–liquid and liquid–liquid flows), but applications in other flow patterns were not encountered. Design/methodology/approach Different sensor geometries were numerically simulated to compare their characteristics and choose the best to measure the water film thickness in the oil–water flow through an impedance-based technique. Finite element method was used for resolving the tridimensional electric field over each sensor. The compared characteristics were the penetration depth, the sensitivity, the minimum spatial resolution (high spatial resolution) and the quasi-linear curve. Findings The best geometry tested has a spatial resolution of 2 × 2 mm, a penetration depth of 700 µm and a quasi-linear response in the measuring range. This geometry was tested by means of conductance and capacitance static experiments. From these experiments, it could be determined that conductance and the capacitance systems are promising for measuring water film thickness in an oil–water flow. Originality/value Several measurement techniques such as micro-PIV, planar laser-induced fluorescence and planar conductive or capacitive sensors that are supposed to be adaptable to the liquid–liquid flow have been proposed recently. Micro-PIV and planar-induced fluorescence need transparent pipes and fluids. On the other hand, conductive or capacitive methods have been only applied to low viscosity fluids. In that context, this paper proposes to study a new technique for non-intrusive measurement of the liquid-liquid flow. The main goal is the validation of the new planar sensor as a reference tool for the development of instrumentation for oilfield application.

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“…Only a few flow applications of planar sensors on multiphase measurements have been reported in the past (BONILLA et al, 2014;THIELE et al, 2009). During the development of this work, a conductance planar sensor with 64 x 16 measuring points was used for water film thickness measurements in oil-water flows (BONILLA et al, 2014). The measured water film thickness had between 100 µm and 700 µm.…”

Section: Film Thickness Measurements In Liquid-liquid Flowmentioning

confidence: 99%

Film thickness measurement with high spatial and temporal resolution planar capacitive sensing in oil-water pipe flow = Medida da espessura de filme usando sensor capacitivo de alta resolução espacial e temporal para escoamentos óleo-água em tubos

Riaño¹,

Adriana²

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The development of a new technique for high spatial and temporal resolution film thickness measurement in oil-water flow is presented. A capacitance measurement system is proposed to measure thin water films near to the wall pipe. A planar sensor was chosen for sensing and some geometries were compared using finite elements method (FEM). The penetration depth, the sensitivity, the minimum spatial resolution (high spatial resolution) and the quasi-linear curve were the analyzed characteristics. Dispersed and unstable-annular oil-water flows patterns were studied in a 12-m long vertical glass pipe, with 50.8 mm of internal diameter, using mineral oil (828 kg/m3 of density and 220 mPa s of viscosity) and tap water. The experimental work was carried out in the multiphase-flow facilities of The Thermal-Fluids Engineering Laboratory (NETeF) of EESC-USP. Experiments with a high-speed video camera and the proposed capacitance system were performed to obtain images of the oil-water flow near the pipe wall. A pre-processing enhancement algorithm and a combined segmentation algorithm are proposed and allowed the measurement of characteristic space and time averaged water film thickness.Experimental results of the capacitive technique showed that the system could measure thickness between 400 µm and 2200 µm. It was possible to recognize and characterize typical behaviors of the two different flow patterns studied. Unstable-annular flow can be described by huge fluctuations on the flow direction and perimeter direction, and big interfacial structures (drops).On the other hand, dispersed flow has tiny fluctuations on the flow direction and perimeter direction, and smaller interfacial structures (droplets). A typical interfacial topology is observed near the pipe wall and it can be treated as an interface between wall and core regions. It is analyzed in time and frequency domains: amplitude, velocity and wavelength quantities can be related to the collected signal at each pair transmitter-receiver of the studied sensor. Correlations for the interfacial-structure velocity were found for dispersed oil-in-water flow and unstableannular flow.

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A high spatial and temporal resolution film thickness sensor in oil - water flows

Cited by 7 publications

References 10 publications

Film thickness planar sensor in oil-water flow: prospective study

Film thickness planar sensor in oil-water flow: prospective study

High spatial and temporal resolution film thickness planar sensor: comparison of geometries

Film thickness measurement with high spatial and temporal resolution planar capacitive sensing in oil-water pipe flow = Medida da espessura de filme usando sensor capacitivo de alta resolução espacial e temporal para escoamentos óleo-água em tubos

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