A Lagrangian study of liquid flow in a reverse-flow hydrocyclone using positron emission particle tracking

Chang, Yuan‐Shiun; Hoffmann, Alex C.

doi:10.1007/s00348-014-1875-5

Cited by 21 publications

(6 citation statements)

References 26 publications

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“…In conventional PET, 3D tracer maps are reconstructed by processing LORs by using projection-based methods [4]. PEPT methods based on different principles and unlimited by projection have been developed and are undergoing innovation [9][10][11][12]. In this work, we developed methods that compare LORs with each other to find the most probable location of the particle centroid.…”

Section: Background and Review Of Positron Imaging Methodsmentioning

confidence: 99%

“…By running this kind of evaluation iteratively, the most likely location can be determined [3,14]. The evolutions of the algorithms, such as fitting the density of cutpoints with peak shape functions for single and multiple particle tracking and weighting the likelihood of a cutpoint on the basis of the particle location found in the previous time step, have been demonstrated to be useful under different conditions [12,15]. In this work, the algorithm was redeveloped to evaluate the relationships between LORs directly in 3D.…”

Section: Single-cell Tracking Algorithmmentioning

confidence: 99%

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Development of an imaging method for in vivo single-cell tracking under high-noise conditions: a proof of principle

Chang,

Struchalin,

Næss

et al. 2023

J. Phys.: Conf. Ser.

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This paper reports the development of a positron imaging method for in vivo single-cell tracking under high-noise conditions. Following biological processes spatially and temporally at a single-cell level in a living organism is desirable for inquiring into the relationships between the behaviours and properties of cells. Positron-emitting radionuclides enable detecting and following radioactivity-labelled substances deep inside living organisms. However, positron imaging has several challenges, such as the distribution of high noise in other areas close to the cell under investigation. In this work, an algorithm for locating a cell with millisecond resolution to combat the strong interference of nearby noise is developed. The feasibility of the method is verified by the demonstration of particle tracking and detection of behavioural changes in an environment with the signal-to-noise ratio of 1:9.

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Section: Background and Review Of Positron Imaging Methodsmentioning

confidence: 99%

Section: Single-cell Tracking Algorithmmentioning

confidence: 99%

Development of an imaging method for in vivo single-cell tracking under high-noise conditions: a proof of principle

Chang,

Struchalin,

Næss

et al. 2023

J. Phys.: Conf. Ser.

Self Cite

View full text Add to dashboard Cite

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“…The study of mixing and segregation in industrial processes has remained a major area of investigation using PEPT since its inception [124,[129][130][131]; more recently, PEPT has additionally been used to study the fundamental dynamics of mixing and segregation phenomena from a more pure-physics perspective [3,132,133]. PEPT is also used extensively in the study of numerous other key industrial processes including extrusion [134,135], fluidisation [7, 35-37, 136, 137], granulation [31,138,139], die-filling [140,141], (hydro)cyclone separation [142][143][144], anaerobic digestion [10,145], stirred tanks, and milling [8,9,69,146].…”

Section: Current Applicationsmentioning

confidence: 99%

Recent advances in positron emission particle tracking: a comparative review

et al. 2022

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Positron emission particle tracking (PEPT) is a technique which allows the high-resolution, three-dimensional imaging of particulate and multiphase systems, including systems which are large, dense, and/or optically opaque, and thus difficult to study using other methodologies. In this work, we bring together researchers from the world's foremost PEPT facilities not only to give a balanced and detailed overview and review of the technique but, for the first time, provide a rigorous, direct, quantitative assessment of the relative strengths and weaknesses of all contemporary PEPT methodologies. We provide detailed explanations of the methodologies explored, including also interactive code examples allowing the reader to actively explore, edit and apply the algorithms discussed. The suite of benchmarking tests performed and described within the document is made available in an open-source repository for future researchers.

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“…The optimization results showed that separators with longer curves or inlets with entrance angles performed better than standard separators. Besides, geometrical parameters such as cylindrical diameter, cone angle, straight section length, overflow diameter, and inlet chamber shape were also investigated to obtain a well-produced hydrocyclone. − Furthermore, some novel-type separators based on the hydrocyclone were proposed. − However, the high inlet velocity results in higher swirl intensity and shear force which cause the droplet breakup and is inconducive to the improvement of separation efficiency. , Additionally, the asymmetric vortex induced high turbulent intensity and droplet breakup, which have an adverse effect on the separation efficiency. ,− …”

Section: Introductionmentioning

confidence: 99%

Experimental Study on a Novel Axial Separator for Oil–Water Separation

Fan

Zhao

et al. 2020

Ind. Eng. Chem. Res.

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In order to ease the pressure on oil price, the downhole oil−water separation system has been adopted to preseparate the output production. However, both the gravity separator and the conventional hydrocyclone in this system have some restrictions, which hinder their widespread application. Therefore, it is necessary to innovate and improve the performance of the oil−water separation device. This paper presents a novel axial separator for oil−water separation based on analysis of droplet trajectory, and an experimental system was fabricated to test the separator. A high-speed camera was used to observe the droplet trajectories at the swirler, and the formation of the oil core was presented. Additionally, experimental investigation was carried out to evaluate the novel separation device in the water flow rate range of 3 to 7 m 3 /h with different inlet oil fractions. In addition, the effect of heavy phase outlet (HPO) pressure on separation efficiency was also studied. The results show that the separator exhibits good performance under the abovementioned experimental conditions. It was also found that the separation efficiency depends on the flow rate and the inlet oil fraction. Furthermore, increasing the HPO pressure is conducive to improve the separation performance.

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A Lagrangian study of liquid flow in a reverse-flow hydrocyclone using positron emission particle tracking

Cited by 21 publications

References 26 publications

Development of an imaging method for in vivo single-cell tracking under high-noise conditions: a proof of principle

Development of an imaging method for in vivo single-cell tracking under high-noise conditions: a proof of principle

Recent advances in positron emission particle tracking: a comparative review

Experimental Study on a Novel Axial Separator for Oil–Water Separation

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