Qualitative and quantitative insights into multiphase flow in ceramic sponges using X-ray computed tomography

Wallenstein, M.; Hafen, Nicolas; Heinzmann, Hartmut; Schug, Sebastian; Arlt, Wolfgang; Kind, Matthias; Dietrich, Benjamin

doi:10.1016/j.ces.2015.08.015

Cited by 24 publications

(10 citation statements)

References 22 publications

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“…Die Verwendung der Computertomographie als Messverfahren ist bei vielen technischen Untersuchungen mittlerweile etabliert. Beispielweise wird die CT für die Bestimmung der Feststoffdichteverteilung in einem Riser , der Strukturaufklärung in Biomasse Festbetten oder der hydrodynamischen Untersuchung von porösen Schwammstrukturen genutzt . Laiblin et al haben als weiteres nicht‐invasives und überlagerungsfreies Messverfahren bei der Betrachtung von chromatographischen Säulen Magnetresonanztomographie verwendet.…”

Section: Introductionunclassified

Measurement of Fluid Dynamics in Random Packings Using High‐Resolution Computed Tomography

Schug

Arlt

2016

Chemie Ingenieur Technik

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Durch Aufnahme computertomographischer Bilder über die Höhe einer Füllkörperkolonne sind lokale und integrale Werte für den Holdup, die benetzte Füllkörperoberfläche und die Stoffaustauschfläche bestimmt worden. Hierfür sind der Raschig Super‐Ring, RMSR und Raflux‐Ring über einen weiten Betriebsbereich untersucht worden. Die Ergebnisse zeigen große Unterschiede zwischen den drei Füllkörpertypen und lassen sich aufgrund der hohen räumlichen Auflösung der Messtechnik quantifizieren. Die Resultate der integralen Werte sind weitgehend unabhängig von der Füllkörperschüttung und auch nach Neuschüttung der Füllkörper reproduzierbar.

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Section: Introductionunclassified

Measurement of Fluid Dynamics in Random Packings Using High‐Resolution Computed Tomography

Schug

Arlt

2016

Chemie Ingenieur Technik

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“…X-ray tomography, which is known from medical diagnostics and non-destructive testing, is increasingly employed to study problems of fluid flow and process engineering [ 1 , 2 , 3 , 4 , 5 ]. In such applications, it is of great importance to have a fast tomographic imaging modality available, as multiphase flows in reactors or other apparatuses are typically transient [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

A Smart Multi-Plane Detector Design for Ultrafast Electron Beam X-ray Computed Tomography

Bieberle

Windisch

Iskander

et al. 2020

Sensors

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In this paper, a smart detector design for novel multi-plane ultrafast electron beam X-ray computed tomography is presented. The concept is based on multi-plane electron beam scanning on a transparent X-ray target and elongated cuboid-shape scintillation detectors for radiation detection over an extended axial scanning range. The optical part of the scintillation detector acts as both an X-ray sensitive scintillator with a fast time response and a light guide. With that, we reduce detector complexity, number of detector elements, overall power consumption, and detector costs. We investigated the performance of this new multi-plane detector design with an evaluation detector setup that is made of cerium doped lutetium yttrium oxyorthosilicate (LYSO:Ce) as scintillation material and an avalanche photodiode (APD) array. Thereby, we assessed two design variants: A monolithic LYSO bar detector and a sandwich detector made of multiple LYSO crystals and glass light-guides. Both types reveal excellent linear detector responses, long-term stabilities, and comparable signal qualities.

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“…For multiphase contacting processes, the effect of the geometrical structure of equipment has been extensively investigated, including for SiC foams, which are widely used in separation processes and catalytic processes, and relevant in‐depth insight into multiphase transport phenomena have been fundamentally gained . Many emerging studies have emphasized the interfacial wettability effects on multiphase transport processes.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamics and mechanism of hydrophobic foam column tray: Contact angle hysteresis effect

Yan

et al. 2019

AIChE Journal

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Interfacial wettability adjustment is a new method for intensifying vapor-liquid mass transfer process. Contact angle effect has been well investigated but not complete due to interfacial wettability consisting of both static behavior (contact angle) and dynamic behavior (contact angle hysteresis). Here, methods of adjusting contact angle hysteresis (CAH) were proposed, and then, the CAH effect on the hydrodynamics was investigated. A multiscale analysis of CAH effect, from interfacial force and wettability to single-bubble and gas-liquid two-phase flow inside the foam to bubble swarm hydrodynamics, was conducted, and thus, the hydrodynamic performance criteria were derived. The interfaces had similar contact angles, whereas a significant difference in the CAH was prepared by using the developed sol dip-coating and spray coating methods. Subsequent experiments revealed that lower CAH can decrease the pressure drop, homogenize the gas distribution, and increase the weeping rate, which are consistent with the derived criteria.

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Qualitative and quantitative insights into multiphase flow in ceramic sponges using X-ray computed tomography

Cited by 24 publications

References 22 publications

Measurement of Fluid Dynamics in Random Packings Using High‐Resolution Computed Tomography

Measurement of Fluid Dynamics in Random Packings Using High‐Resolution Computed Tomography

A Smart Multi-Plane Detector Design for Ultrafast Electron Beam X-ray Computed Tomography

Hydrodynamics and mechanism of hydrophobic foam column tray: Contact angle hysteresis effect

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