Development of a Neutron-Radiographic Technique for Investigating Physical Models of Fluidized Beds

G. L. Catchen, D. E. Hughes, Anil Kamalakant Kulkarni, K. M. Ross, W. R. Ammerman

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This paper describes the results of the application of neutron radiography to the study of a two-phase medium, and the resulting technique can be extended to the study of two-phase flow in a fluidized bed. Neutron radiography allows the nonintrusive visualization of a sand/air bed enclosed in aluminum walls. This capability exceeds what others have been able to observe using conventional optical or radiographic techniques. A static 15 cm thick sand model was constructed and examined by the radiographic technique. The technique employed a collimated thermal column of neutrons, an image intensifier, and conventional photography. To simulate a fluidized bed, spherical voids of several centimeters in diameter were created by placing thin-walled empty aluminum shells in the sand bed. Also, hollow tubes were inserted in the bed. As a function of neutron fluence, high contrast images of the voids inside the 15 cm thick bed were obtained and analyzed. This technique can be extended to the study of dynamic beds by using the neutron source, i.e., the nuclear reactor, in the pulsed mode. Also, contrast agents may be used to extend the range of experimental situation under which high contrast images may be obtained.

Original languageEnglish (US)
Pages (from-to)73-84
Number of pages12
JournalChemical Engineering Communications
Volume54
Issue number1-6
DOIs
StatePublished - Jan 1 1987

Fingerprint

Fluidized beds
Neutron radiography
Neutrons
Sand
Aluminum
Neutron sources
Photography
Nuclear reactors
Two phase flow
Contrast Media
Visualization
Air
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Catchen, G. L. ; Hughes, D. E. ; Kulkarni, Anil Kamalakant ; Ross, K. M. ; Ammerman, W. R. / Development of a Neutron-Radiographic Technique for Investigating Physical Models of Fluidized Beds. In: Chemical Engineering Communications. 1987 ; Vol. 54, No. 1-6. pp. 73-84.
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Development of a Neutron-Radiographic Technique for Investigating Physical Models of Fluidized Beds. / Catchen, G. L.; Hughes, D. E.; Kulkarni, Anil Kamalakant; Ross, K. M.; Ammerman, W. R.

In: Chemical Engineering Communications, Vol. 54, No. 1-6, 01.01.1987, p. 73-84.

Research output: Contribution to journalArticle

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