Modelling of multiphase flow in packed beds by computer-assisted x-ray tomography

Toye, Dominique; Marchot, Pierre; Crine, Michel; L'Homme, Guy

doi:10.1088/0957-0233/7/3/027

Cited by 55 publications

(29 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Each of the different possible tomographic techniques has its advantages and drawbacks: the X-ray tomography used by Toye et al (1996Toye et al ( , 1997 is well suited for very small velocities, since the gasliquid repartition has to be constant during a measurement, which is quite slow. In the present work, the capacitive tomography developed by the team of Hanover was used (Reinecke, 1996;Mewes, 1996a, 1996b;Reinecke et al, 1998) found in the mentioned papers.…”

Section: Capacitive Tomographymentioning

confidence: 99%

Liquid Distribution in Trickle-Bed Reactor

Marcandelli¹,

Lamine

Bernard³

et al. 2000

Oil & Gas Science and Technology - Rev. IFP

View full text Add to dashboard Cite

Section: Capacitive Tomographymentioning

confidence: 99%

Liquid Distribution in Trickle-Bed Reactor

Marcandelli¹,

Lamine

Bernard³

et al. 2000

Oil & Gas Science and Technology - Rev. IFP

View full text Add to dashboard Cite

“…An X-ray CT system was developed by Toye et al [24] specifically for X-ray CT flow visualization of liquid holdup and maldistribution in packed beds. The X-ray system produced a fan beam that was captured with a linear array of 1024 photodiodes, each 1.66 mm wide.…”

Section: Examples Of X-ray Ct Imaging Of Fluid Flowsmentioning

confidence: 99%

“…This makes the reconstruction easier, but, because of the detection systems and source strength, data acquisition is typically slow. Of the ionizing radiation (hard field) techniques, X-ray imaging is safest because the sources only emit X-rays when they are powered and their energy can be controlled by varying the input voltage [18,24]. Toye et al [24] also note that X-rays are preferred over c-rays because the X-rays provide better spatial resolution due to improvements in X-ray detector technology in recent years.…”

Section: Introductionmentioning

confidence: 99%

“…Of the ionizing radiation (hard field) techniques, X-ray imaging is safest because the sources only emit X-rays when they are powered and their energy can be controlled by varying the input voltage [18,24]. Toye et al [24] also note that X-rays are preferred over c-rays because the X-rays provide better spatial resolution due to improvements in X-ray detector technology in recent years. X-ray tubes also provide a smaller spot size when compared to c-ray sources of equivalent strength, which also provides improved spatial resolution.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Review of X-Ray Flow Visualization With Applications to Multiphase Flows

Heindel

2011

Journal of Fluids Engineering

185

134

View full text Add to dashboard Cite

Flow visualization and characterization of multiphase flows have been the quest of many fluid mechanicians. The process is fairly straight forward only when there is good optical access (i.e., the vessel is not opaque or there are appropriate viewing ports) and the flow is transparent, implying a very low volume fraction of the dispersed phase; however, when optical access is not good or the fluid is opaque, alternative methods must be developed. Several different noninvasive visualization tools have been developed to provide high-quality qualitative and quantitative data of various multiphase flow characteristics, and overviews of these methods have appeared in the literature. X-ray imaging is one family of noninvasive measurement techniques used extensively for product testing and evaluation of static objects with complex structures. X-rays can also be used to visualize and characterize multiphase flows. This paper provides a review of the current status of X-ray flow visualization and details various X-ray flow visualization methods that can provide qualitative and quantitative information about the characteristics of complex multiphase flows. Flow visualization and characterization of multiphase flows have been the quest of many fluid mechanicians. The process is fairly straight forward only when there is good optical access (i.e., the vessel is not opaque or there are appropriate viewing ports) and the flow is transparent, implying a very low volume fraction of the dispersed phase; however, when optical access is not good or the fluid is opaque, alternative methods must be developed. Several different noninvasive visualization tools have been developed to provide high-quality qualitative and quantitative data of various multiphase flow characteristics, and overviews of these methods have appeared in the literature. X-ray imaging is one family of noninvasive measurement techniques used extensively for product testing and evaluation of static objects with complex structures. X-rays can also be used to visualize and characterize multiphase flows. This paper provides a review of the current status of X-ray flow visualization and details various X-ray flow visualization methods that can provide qualitative and quantitative information about the characteristics of complex multiphase flows.

show abstract

“…A comprehensive review discussing applications of GDT to multiphase flows is provided by Munshi (1990). Typical applications have included two-phase gas-liquid pipe flows for the nuclear industry (Hewitt, 1978), saturation measurements in porous media (Reda et al, 1981;Brown et al, 19931, gas-solid fluidized beds (MacCuaig et al, 1985;Dyakowski, 1996), gas-liquid flow in packed beds (Toye et al, 1996), particle-laden liquid flows (Shollenberger et al, 1997b), horizontal stratified three-phase pipe flow (Pan and Hewitt, 19951, and bubble columns (Kumar et al, 1995;Shollenberger et al, 1995ab;Adkins et al, 1996;Shollenberger et al, 1997a;Torczynski et al, 1995;Torczynski et al, 1996ac).…”

mentioning

confidence: 99%