Uncertainty and intrusiveness of three-layer wire-mesh sensor

Ito, Daisuke; Prasser, Horst-Michael; Kikura, Hiroshige; Aritomi, Masanori

doi:10.1016/j.flowmeasinst.2011.03.002

Cited by 48 publications

(27 citation statements)

References 9 publications

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“…As reported by Wangjiraniran et al [14], the deceleration due to the presence of wire was observed to reach 40-50% in case of liquid superficial velocity lower than 0.2 m/s. This was confirmed by the result from Ito et al [1]. The bubble velocity was then recovered after 4d-8d downstream of the sensor (d = 2 mm, is the axial distance between two wires).…”

Section: Introductionsupporting

confidence: 76%

“…The bubble velocity was then recovered after 4d-8d downstream of the sensor (d = 2 mm, is the axial distance between two wires). The deceleration effect disappeared at J L = 0.6 m/s and as J L increased up to 0.8 m/s, a slight acceleration within axial distance between two wires was observed as can be seen in [1]. It can be explained by the obstruction of the flow area http://dx.doi.org/10.1016/j.expthermflusci.2015.02.022 0894-1777/Ó 2015 Elsevier Inc. All rights reserved.…”

Section: Introductionmentioning

confidence: 63%

“…The intrusive effects appear in form of bubble fragmentation [7] and bubble deceleration when it touches the wires [1,7,14]. As reported by Wangjiraniran et al [14], the deceleration due to the presence of wire was observed to reach 40-50% in case of liquid superficial velocity lower than 0.2 m/s.…”

Section: Introductionmentioning

confidence: 70%

“…However, there was a significant difference as it close to the wall or at the edges of the pipe due to an inherent limitation of the devices in this region. On the basis of equivalent bubble size, Scholz et al [3], an overestimation up to 50% and 20% was found at low and high liquid superficial velocity, respectively, while the result from Ito et al [1] showed a scattering result within ±20% both for low and high liquid superficial velocities.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

On the accuracy of wire-mesh sensors in dependence of bubble sizes and liquid flow rates

Nuryadin

Ignaczak

Lucas

et al. 2015

Experimental Thermal and Fluid Science

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Section: Introductionsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the accuracy of wire-mesh sensors in dependence of bubble sizes and liquid flow rates

Nuryadin

Ignaczak

Lucas

et al. 2015

Experimental Thermal and Fluid Science

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“…Of course, the disadvantage of wire mesh sensors is that they are inherently invasive, and therefore the application of these devices in certain processes may be problematic. The intrusive effects of wire mesh sensors have been studied by comparison with high speed camera measurements in transparent systems (Fuangworawong, Kikura, Aritomi, & Komeno, 2007;Ito, Prasser, Kikura, & Aritomi, 2011;Wangjiraniran et al, 2003). These studies revealed that the wire mesh can cause bubbles to break up and to either slow or accelerate, depending on the liquid velocity.…”

Section: Fluid Phase Fraction Measurementsmentioning

confidence: 99%

Applications of tomography in bubble column and trickle bed reactors

Holland

2015

Industrial Tomography

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Investigating the effect of pressure on a vertical two‐phase upward flow with a high viscosity liquid

et al. 2019

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This article presents void fraction and pressure gradient data for sulfur hexafluoride (SF6) with gas densities of 28 and 45 kg/m3 and oil (with viscosity 35 times that for water) in a 127 mm diameter pipe. The superficial velocities of gas ranged from 0.1 to 3 m/s and those for liquid from 0.1 to 1 m/s, respectively. Measurements of void fraction data were recorded using a capacitance wire mesh sensor (WMS) system, which permits the 3D visualization of the flow patterns. All the data were obtained with a data acquisition frequency of 1,000 Hz. A differential pressure transducer was used to measure the pressure drops along the length of the pipe. The WMS provide time and cross‐sectionally resolved data on void fraction and from an analysis of its output, flow patterns were identified using the characteristic signatures of probability density function (PDF) plot of time series of void fraction. The PDF plots showed the single peak shapes associated with bubbly and churn flows but not the twin‐peaked shape usually seen in slug flows. This confirms previous work in larger diameter pipes but with less viscous liquids. For the bubble and churn flows investigated, the pressure gradient was observed to decrease with an increase in gas superficial velocity. Nevertheless, there was an insignificant observed effect of pressure on void fraction below certain transitional flow rates, the effect however became significant beyond these values. In the present work, wisps appear to be smaller, which might be due to the different fluid properties of the working fluids employed. In addition, wisps are easily revealed as long as there is a transition between churn and annular flows regardless of the pressure. Experimental data on void fraction and pressure gradient are compared against existing data. Reasonably good agreements were observed from the results of the comparison.

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Uncertainty and intrusiveness of three-layer wire-mesh sensor

Cited by 48 publications

References 9 publications

On the accuracy of wire-mesh sensors in dependence of bubble sizes and liquid flow rates

On the accuracy of wire-mesh sensors in dependence of bubble sizes and liquid flow rates

Applications of tomography in bubble column and trickle bed reactors

Investigating the effect of pressure on a vertical two‐phase upward flow with a high viscosity liquid

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