Ultra fast electron beam X-ray computed tomography for two-phase flow measurement

Fischer, F.; Hampel, Uwe

doi:10.1016/j.nucengdes.2009.11.016

Cited by 98 publications

(47 citation statements)

References 8 publications

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“…The in-house developed ultrafast electron beam X-ray tomography setup 41,42 was used to visualize stacks of crosssectional images of the flow structure inside the SBC. The details of the experimental tomographic technique and the applied image reconstruction procedure are explained in previous publications.…”

Section: Experimental Setup and Ultrafast Electron Beam X-ray Tomographymentioning

confidence: 99%

Regime transition in viscous and pseudo viscous systems: A comparative study

2014

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A comprehensive quantitative study on the effect of liquid viscosity (1 l L 1149 mPa-s) on the local flow phenomena of the gas phase in a small diameter bubble column is performed using ultrafast electron beam X-ray tomography. The internal dynamic flow structure and the bubble size distribution shows a dual role of the liquid viscosity on the hydrodynamics. Further, the effect of solid concentration (C s 5 0.05, 0.20) on the local flow behavior of the gas phase is studied for the pseudo slurry viscosities similar to the liquid viscosities of the gas-liquid systems. The effects of liquid and pseudo slurry viscosities on flow structure, bubble size distribution, and gas phase distribution are compared. The bubble coalescence is significantly enhanced with the addition of particles as compared to the system without particles for apparently same viscosity. The superficial gas velocity at which transition from homogeneous bubbly to slug flow regime occurs is initiated by the addition of particles as compared to the particle free system for apparently same viscosity. V C

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Section: Experimental Setup and Ultrafast Electron Beam X-ray Tomographymentioning

confidence: 99%

Regime transition in viscous and pseudo viscous systems: A comparative study

2014

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“…An operation rack to fix the scanner and to adjust the scanned objects as well as a measurement PC for data processing completes the system. It should be noted that the current equipment is a newly constructed scanner with increased capacity of measurement geometry up to column diameters of 160 mm in contrary to the previous scanner (Fischer et al 2008;Fischer and Hampel 2010;Hampel et al 2012). The maximum operating frequency is 8000 Hz, which is similar to the older scanner.…”

Section: Ultrafast X-ray Tomographymentioning

confidence: 99%

Voronoï analysis of bubbly flows via ultrafast X-ray tomographic imaging

et al. 2016

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“…Process Engineering, Technische Universität Dresden, Dresden 01062, Germany 2 Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden 01328, Germany Tomographic image reconstruction is based on recovering an object distribution from its projections, which have been acquired from all angular views around the object. If the angular range is limited to less than 180 • of parallel projections, typical reconstruction artefacts arise when using standard algorithms.…”

Section: Areva Endowed Chair Of Imaging Techniques In Energy Andmentioning

confidence: 99%

“…For a complete tomographic projection dataset, the detector arc and X-ray source path on the target must overlap in a certain angular range. Technical realization is thus possible in two ways: either the X-ray source path and detector arc are in different planes [2] or parts of the projection dataset are missing. This article deals with the latter case, in which the angular range of projections is limited, while the uncertainty in the axial direction is minimized.…”

Section: Introductionmentioning

confidence: 99%