Estimation of volume fractions and flow regime identification in multiphase flow based on gamma measurements and multivariate calibration

Arvoh, Benjamin Kaku; Hoffmann, Rainer; Halstensen, Maths

doi:10.1016/j.flowmeasinst.2011.11.002

Cited by 56 publications

(49 citation statements)

References 15 publications

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“…The presented methods and described experiment, as well as attached literature, allow to formulate the following proposals: -radioisotopes may profitably supplement traditional method of multiphase flow analysis [15][16][17], -reduction of the necessary assumption demanded for radiotracer experiments allows applying easier measuring procedures and extending their range of application [18][19][20][21][22][23][24][25], -huge development in radiotracer methods, especially in flow velocity measurements, allows both reduction of the radioactivity and increase of the measurements' accuracy [20,[26][27][28][29], -in many cases, application of radioisotopes may bring smaller hazard due to mass of radioisotopes reduction [30][31][32][33], -in some measurements radiotracers may be replaced by sealed radioactive sources [10,16,26] -equipment based on a pair of sealed radioactive sources appeared to be convenient for two-phase flow control [34][35][36], -simultaneous application of tracers and sealed sources gives possibility of more detailed analysis of complex flows [37][38][39][40].…”

Section: Discussionmentioning

confidence: 99%

Improvement of radiotracers experiments in mass transfer processes

et al. 2017

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Abstract. The greatest part of industrial mass transfer is based on continuous transportation of different substances throughout especially constructed installations. In that kind of practice, a flow of such mass in each part determines the process unit and can be described by the residence time distribution (RTD) of the substance inside this unit. This parameter may be evaluated by the properly arranged tracer experiment. It is worthwhile to notice that flow components are labeling for a sufficiently long time for offering a lot of advanced techniques fitted to the particular circumstances.

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Section: Discussionmentioning

confidence: 99%

Improvement of radiotracers experiments in mass transfer processes

et al. 2017

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“…Moreover, in connection with the calibration, one may obtain the density or solid phase concentration plot [2,3].…”

Section: Density Measurementmentioning

confidence: 99%

“…For example, the size of the grains may vary and decreasing of the velocity would cause sedimentation of the solid phase. Moreover, even small modification of viscosity or the wall roughness may radically change head losses and turbulence of the flow [1,2].…”

Section: Introductionmentioning

confidence: 99%

Possibilities of radioisotope measuring in control of an unstable solid particles hydrotransport

Petryka

Zych

Hanus

et al. 2016

EPJ Web of Conferences

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Abstract. The paper presents Ȗ-radiation proposal to control a multiphase flow, independently from circumstances. So this method may be applied even in compound industrial or environmental processes. Moreover in many cases, it is the only method for applications for dense mixture containing coarse angular grains. The constructed equipment allows continuous measurement of density as well as solid phase for both concentration and average velocity. Due to pressure loss, it gives the output digital signal convenient for cybernation of the control process. The proposed procedures were tested at a laboratory installation modeling conditions expected during planned excavation of nodules from Pacific bottom.

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“…The measurement of air bubbles velocity was arrange by the measuring system consisting of two γ-radioactive sources (1) and two scintillation probes (2). The measuring set is mounted on a special trolley (8), which allows moving the set along the pipeline. Independently water flow rate was continuously measured by Uniflow 990 ultrasonic flowmeter (3).…”

Section: Gamma-absorption In Two-phase Flow Evaluation and Laboratorymentioning

confidence: 99%

Velocity measurements of the liquid - gas flow using gamma absorption and modified conditional averaging

Hanus

Zych

Kowalczyk

et al. 2015

EPJ Web of Conferences

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Abstract. The paper presents idea and an exemplary application of gamma-absorption in the measurement of gas bubbles transportation in a gas-liquid mixture flow through a horizontal pipeline. In the tests on laboratory installation two 241 Am radioactive sources and probes with NaI(Tl) scintillation crystals have been used. For analysis of electrical signals obtained from detectors the modified conditional averaging of the absolute value of delayed signal (CAAV) is proposed. The proposed method is based on the quotient of classical crosscorrelation (CCF) and CAAV. Results of the time delay estimation and gas-phase velocity measurements are compared with one obtained using CCF. The combined uncertainties of the mean velocity of air bubbles evaluation in the presented experiment did not exceed 2.1% (CCF) and 1.7% (CCF/CAAV), which is a satisfactory result in industrial applications.

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Estimation of volume fractions and flow regime identification in multiphase flow based on gamma measurements and multivariate calibration

Cited by 56 publications

References 15 publications

Improvement of radiotracers experiments in mass transfer processes

Improvement of radiotracers experiments in mass transfer processes

Possibilities of radioisotope measuring in control of an unstable solid particles hydrotransport

Velocity measurements of the liquid - gas flow using gamma absorption and modified conditional averaging

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