NDLI: Using X-Rays for Multiphase Flow Visualization

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Theodore, J. Heindel Jeremy, L. Hubers Terrence, C. Jensen Joseph, N. Gray Alexander, C. Striegel
Copyright Year	2005
Abstract	Gas-liquid, gas-solid, liquid-solid, and gas-liquid-solid multiphase flows are difficult to visualize, characterize, and quantify because the systems are typically opaque. Invasive or noninvasive measurement methods are typically used for determining internal flow and transport characteristics of these complex flows. The difficulty with invasive methods is that they can alter the internal flow of a multiphase system causing interference with realistic process measurements. X-ray imaging provides one family of noninvasive measurement techniques used extensively for product testing and evaluation of static objects with complex structures. These techniques have been extended to visualize dynamic systems, such as those which characterize multiphase flows. This paper will describe a new X-ray flow visualization facility for large-scale multiphase flows. X-ray radiography and X-ray computed tomography of static and dynamic systems will be used to demonstrate system capabilities. Radiographic images will show bread dough rising, objects falling in a liquid, large bubbles rising in a 32 cm ID column of water, and operation of a 32 cm ID bubble column. X-ray computed tomography of a large static object will demonstrate visualization capabilities. X-ray computed tomography of a multiphase flow in a 32 cm bubble column will show local time-averaged gas holdup values for various operating conditions. Finally, challenges associated with X-ray stereographic imaging to capture time-resolved dynamic events will be outlined.
Sponsorship	Fluids Engineering Division
Starting Page	415
Ending Page	423
Page Count	9
File Format	PDF
ISBN	0791841995
DOI	10.1115/FEDSM2005-77359
e-ISBN	0791837602
Volume Number	Volume 2: Fora
Conference Proceedings	ASME 2005 Fluids Engineering Division Summer Meeting
Language	English
Publisher Date	2005-06-19
Publisher Place	Houston, Texas, USA
Access Restriction	Subscribed
Subject Keyword	Water Visualization Multiphase flow Dynamic systems X-rays Product testing Flow (dynamics) Computerized tomography X-ray imaging Bubbles Internal flow Imaging Flow visualization
Content Type	Text
Resource Type	Article

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