Journal ArticleDOI
Positron emission tomography applied to fluidization engineering
Chutima Dechsiri,Andrea Ghione,Florence van de Wiel,Herold Dehling,Anne M. J. Paans,Alex C. Hoffmann +5 more
Reads0
Chats0
TLDR
In this paper, the movement of particles in a laboratory fluidized bed has been studied using Positron Emission Tomography (PET), with this non-invasive technique both pulses of various shapes and single tracer particles were followed in 3D.Abstract:
The movement of particles in a laboratory fluidized bed has been studied using Positron Emission Tomography (PET). With this non-invasive technique both pulses of various shapes and single tracer particles were followed in 3-D. The equipment and materials used made it possible to label actual bed particles as tracer. This paper briefly describes the data analysis, some of the results and compares them with a stochastic model. The results confirm the basic assumptions of the model qualitatively but not quantitatively. Further analysis of the results indicates that the system exhibits gulf-streaming, a feature which is not yet accounted for in the model, but is common in fluidized beds in practice.read more
Citations
More filters
Journal ArticleDOI
Bubble formation and dynamics in gas–liquid–solid fluidization—A review
G.Q. Yang,Bing Du,Liang-Shih Fan +2 more
TL;DR: In this paper, the authors summarize the salient characteristics of liquid, bubbles, and particles and their interactive behavior and dynamics in the process of bubble formation and bubble rising in gas-liquid-solid fluidization systems.
Journal ArticleDOI
A Review of X-Ray Flow Visualization With Applications to Multiphase Flows
TL;DR: A review of the current status of X-ray flow visualization can be found in this paper, where the authors provide qualitative and quantitative information about the characteristics of complex multiphase flows, as well as their applications in the field of complex fluid analysis.
Journal ArticleDOI
Electrical capacitance volume tomography: design and applications.
TL;DR: ECVT, developed from the two-dimensional electrical capacitance tomography (ECT), is a promising non-intrusive imaging technology that can provide real-time three-dimensional images of the sensing domain that render it a favorable tool to be utilized for industrial applications and fundamental multi-phase flow research.
Journal ArticleDOI
Horizontal gas and gas/solid jet penetration in a gas–solid fluidized bed
TL;DR: In this paper, the instantaneous properties of the shape of the jets and volumetric solids holdup are qualified and quantified using the three-dimensional electrical capacitance volume tomography (ECVT) recently developed in the authors' group.
Journal ArticleDOI
Combined positron emission tomography and computed tomography to visualize and quantify fluid flow in sedimentary rocks
Martin A. Fernø,Jarand Gauteplass,Lars Petter Hauge,Geir Espen Abell,Tom Christian Holm Adamsen,Arne Graue +5 more
TL;DR: In this paper, the combined PET and computed tomography (CT) imaging of flow processes within porous rocks is used to quantify the development in local fluid saturations. But the applicability of each visualization technique is evaluated for a range of displacement processes, and the favorable implementation of combining PET/CT for laboratory core analysis is discussed.
References
More filters
Journal ArticleDOI
The mechanics of large bubbles rising through extended liquids and through liquids in tubes
TL;DR: In this article, the authors describe measurements of the shape and rate of rise of air bubbles varying in volume from 1·5 to 200 cm. 3 when they rise through nitrobenzene or water.
Journal ArticleDOI
A Statistical Model for Positron Emission Tomography
TL;DR: In this article, a mathematical model tailored to the physics of positron emissions is presented, and the model is used to describe the image reconstruction problem of PET as a standard problem in statistical estimation from incomplete data.
Journal ArticleDOI
Estimation of bubble diameter in gaseous fluidized beds
TL;DR: In this article, a correlation of the bubble size and growth in fluidized beds of various diameters is developed, and a maximum bubble diameter determined from the bubble coalescence is incorporated in the correlation to relate the effect of the bed diameter on bubble size.
Journal ArticleDOI
Positron emission particle tracking using the new Birmingham positron camera
TL;DR: A new positron camera has recently been installed at the University of Birmingham as mentioned in this paper, which consists of a pair of NaI (Tl) gamma camera heads with fully digital readout and offers an enormous improvement in data rate and data quality.
Journal ArticleDOI
Solids motion in bubbling gas fluidised beds
TL;DR: In this article, the authors used the non-invasive positron emission particle tracking (PEPT) technique to observe and quantify particle trajectory, solids flow pattern, and solids velocity.