Optimal design of a four-sensor probe system to measure the flow properties of the dispersed phase in bubbly air–water multiphase flows

Pradhan, Suman; Mishra, Rakesh; Ubbi, Kuldip; Asim, Taimoor

doi:10.1016/j.sna.2013.06.014

Cited by 7 publications

(5 citation statements)

References 13 publications

(17 reference statements)

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“…Specification of appropriate boundary conditions is critical to the accuracy of any numerical analysis [27][28]. In the present study, the inlet boundary of the flow domain has been specified as mass flow inlet, while the outlet boundary has been specified as pressure outlet.…”

Section: Solver Settingsmentioning

confidence: 99%

Effects of the geometrical features of flow paths on the flow capacity of a control valve trim

Asim

Mishra

Oliveira-Jr

et al. 2019

Journal of Petroleum Science and Engineering

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Control valves are an integral part of a number of energy systems, such as those used in chemical and nuclear industries. These valves are used to regulate the amount of fluid flow passing through these systems. A key component of a control valve is its trim, which in case of a multi-stage continuous-resistance trim consists of a staggered arrangement of columns.Flow passing through the channels formed between adjacent columns (also called as flow paths), loses a significant amount of its energy and regulates the pressure field. As the geometrical features of these flow paths dictate the flow capacity of the trim, systematic investigations have been carried out to analyse the complex flow behaviour within these flow paths. Well-verified computational fluid dynamics based solver has been used to investigate the effects of the geometrical features of flow paths on the flow capacity of the trim, at various valve opening positions. It has been noticed that reducing the size of flow paths increases the flow capacity of the trim, however, at a critical flow path size, the inherent opening characteristics of a trim have been observed to alter. In order to recover the original opening behaviour of the trim, careful manipulation of the flow paths is required, which has been successfully achieved in the present investigation.

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Section: Solver Settingsmentioning

confidence: 99%

Effects of the geometrical features of flow paths on the flow capacity of a control valve trim

Asim

Mishra

Oliveira-Jr

et al. 2019

Journal of Petroleum Science and Engineering

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“…The existing literature for needle probe sensors (Kataoka et al, 1986;Kataoka and Serizawa, 1990;Revankar and Ishii, 1992;Kalkach-Navarro et al, 1993;Cartellier, 1999;Dias et al, 2000;Fu, 2001;Wu et al, 2001;Kim et al, 2001;Euh et al, 2001;Shen et al, 2005;Pradhan et al, 2013) is employed to measure the local two-phase flow parameters in the present work. The four-sensor conductivity probe design used in the present experiments is based in the previous work of (Kim et al, 2001) and consisted of 4 enamelled copper wires (0.2 mm outer diameter).…”

Section: Four-sensor Probe Methodologymentioning

confidence: 99%

Local parameters of air–water two-phase flow at a vertical T-junction

Monrós-Andreu

Martínez‐Cuenca

Torró

et al. 2017

Nuclear Engineering and Design

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Significant experimental work and modeling about vertical T-junction as a phase separator has been done for churn and annular flows, but a survey on the literature reveals a lack of experimental data regarding bubbly flow nor any phenomenological explanation to their behavior. The objective of this work is to extend the understanding of these junctions by obtaining complete datasets, i.e. of both gas and liquid, of the phase splitting process in bubbly flow conditions by means of conductivity needle probes, Laser Doppler anemometry and visual inspection. Measurements and observations of the phase split, as well as the vortex structure in a vertical T-junction with equal pipe diameters (52 mm inner diameter), are reported. Results suggest a relationship between the vortex structure and the efficiency of the junction as phase separator.

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“…The previous works on sensor optimization are mainly focused on the average distribution characteristics of the sensor sensitivity field [23,24], such as the sensor relative sensitivity and the sensitivity variation parameter (SVP). Recently, new progress in the optimization method based on the local sensitivity field [25], the multi-index optim ization design [26], and multi-field coupling optimization [27] have been achieved. However, improving the uniformity of the sensor sensitivity field is still an important issue in sensor geometry optimization to reduce the dependence of the sensor response on the flow structures, which results in difficulties in understanding the response of the large-scale sensor if no detailed flow structures are detected.…”

Section: Measurement Science and Technologymentioning

confidence: 99%

The measurement of gas–liquid two-phase flows in a small diameter pipe using a dual-sensor multi-electrode conductance probe

Zhai¹,

Bian²,

Han³

et al. 2016

Meas. Sci. Technol.

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We design a dual-sensor multi-electrode conductance probe to measure the flow parameters of gas–liquid two-phase flows in a vertical pipe with an inner diameter of 20 mm. The designed conductance probe consists of a phase volume fraction sensor (PVFS) and a cross-correlation velocity sensor (CCVS). Through inserting an insulated flow deflector in the central part of the pipe, the gas–liquid two-phase flows are forced to pass through an annual space. The multiple electrodes of the PVFS and the CCVS are flush-mounted on the inside of the pipe wall and the outside of the flow deflector, respectively. The geometry dimension of the PVFS is optimized based on the distribution characteristics of the sensor sensitivity field. In the flow loop test of vertical upward gas–liquid two-phase flows, the output signals from the dual-sensor multi-electrode conductance probe are collected by a data acquisition device from the National Instruments (NI) Corporation. The information transferring characteristics of local flow structures in the annular space are investigated using the transfer entropy theory. Additionally, the kinematic wave velocity is measured based on the drift velocity model to investigate the propagation behavior of the stable kinematic wave in the annular space. Finally, according to the motion characteristics of the gas–liquid two-phase flows, the drift velocity model based on the flow patterns is constructed to measure the individual phase flow rate with higher accuracy.

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Optimal design of a four-sensor probe system to measure the flow properties of the dispersed phase in bubbly air–water multiphase flows

Cited by 7 publications

References 13 publications

Effects of the geometrical features of flow paths on the flow capacity of a control valve trim

Effects of the geometrical features of flow paths on the flow capacity of a control valve trim

Local parameters of air–water two-phase flow at a vertical T-junction

The measurement of gas–liquid two-phase flows in a small diameter pipe using a dual-sensor multi-electrode conductance probe

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