Tomographic Measurement Techniques - Visualization of Multiphase Flows

Reinecke, N.; Petritsch, Georg; Schmitz, Dagmar; Mewes, Dieter

doi:10.1002/(sici)1521-4125(199801)21:1<7::aid-ceat7>3.0.co;2-k

Cited by 73 publications

(21 citation statements)

References 46 publications

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“…Tomography based on nuclear magnetic resonance spectroscopy (NMR) is a well‐established imaging technique in human medicine . Compared to medical applications, tomographic approaches in the investigation of multiphase flows in apparatus were applied recently . The tomography is entirely non‐invasive and can be used without restriction in opaque media.…”

Section: Measurement Methodsmentioning

confidence: 99%

Particle Measurement Techniques in Fluid Process Engineering

Lichti

Bart

2018

ChemBioEng Reviews

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Droplets, bubbles, or solid particle concentrations and their particle size distributions markedly influence the process conditions. In this article, an overview with respect to popular invasive and non‐invasive local measurement techniques for bubbles and droplets will be given. It starts with capillary suction probes, laser Doppler anemometry and finally covers actual developments in tomography and optical endoscopic measurement techniques. Furthermore, the possibilities and limitations of analyzing particle size distributions with these different methods in various application fields will be discussed.

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Section: Measurement Methodsmentioning

confidence: 99%

Particle Measurement Techniques in Fluid Process Engineering

Lichti

Bart

2018

ChemBioEng Reviews

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“…Reinecke et al. contributed an overview on tomographic measurement techniques. Further information on flow measurement techniques and multiphase flow dynamics can also be found in and .…”

Section: Particle Swarm Characterizationmentioning

confidence: 99%

Description of Disperse Multiphase Processes: Quo Vadis?

Hohl

Panckow

Schulz

et al. 2018

Chemie Ingenieur Technik

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The experimental accessibility of disperse systems often is a critical factor when it comes to the development of modeling approaches that intend to converge towards an exact solution. Often, integral or pseudo‐homogeneous values are used to reduce the complexity of the system, but a detailed single particle or interface analysis is crucial to understand relevant effects that also affect the swarm behavior. A high number of experimental techniques with respective limitations and advantages is available to quantify these effects. In this work, an overview on measurement techniques for momentum, heat and mass transfer in particle swarms as well as for the particle size distribution and interface characterization is provided. The industrial applicability is addressed by pointing out the vicinity to the process and the costs of different measurement techniques.

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“…In the second step, the local values are calculated and the phase distribution is reconstructed by mathematical ap-proximation. Johansen et al 8 and Reinecke et al 9 have discussed the reconstruction methods used to generate tomographic results. In both studies, capacitance tomography was used.…”

Section: Gamma Densitometer Systemmentioning

confidence: 99%

“…In both studies, capacitance tomography was used. Reinecke et al 9 pointed out two methods for reconstruction, namely, series expansion and inversion. In the present work, a Mathematica program GAMMATOM was written to produce tomographical results for each case.…”

Section: Gamma Densitometer Systemmentioning

confidence: 99%

Spatial Distribution of Oil and Water in Horizontal Pipe Flow

2000

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In this paper we report a series of experiments to quantify the spatial distribution and identify the flow pattern of liquid-liquid flow in a horizontal 25.4-mm ͑nominal 1-in.͒ tube. Experimental results are presented for kerosene ͑EXXOL D80͒ and tap water at room temperature. Two different measurement techniques ͑a high frequency impedance probe and a gamma densitometer system͒ were applied for measuring the volume fraction distribution across the tube and to obtain tomographic results for phase distribution. The use of the gamma densitometer system to obtain the tomographic results in liquid-liquid cocurrent flow is believed to be the first in this field. These methods are more precise than other techniques such as visualization and help to distinguish certain differences in flow patterns for different superficial velocities and liquid fractions. The two sets of measurements were compared and it was concluded that the gamma densitometer system was a more reliable method by which to measure the volume fraction. Two important phenomena in liquid-liquid flow were observed: oil encapsulation by water at low mixture velocity and droplets concentrated at the center of the pipe in the dispersed flow regime. Some possible explanations are given regarding these phenomena.

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Tomographic Measurement Techniques - Visualization of Multiphase Flows

Cited by 73 publications

References 46 publications

Particle Measurement Techniques in Fluid Process Engineering

Particle Measurement Techniques in Fluid Process Engineering

Description of Disperse Multiphase Processes: Quo Vadis?

Spatial Distribution of Oil and Water in Horizontal Pipe Flow

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