Persistence of frequency in gas–liquid flows across a change in pipe diameter or orientation
From a study of the characteristics of structures across a 67/38 mm sudden contraction, using air/silicone oil flows, it has been found that frequencies of the structures (mainly slugs) persist across the contraction. This is in contrast to the velocities and lengths which increase as they move into...
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| Format: | Article |
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Elsevier
2014
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| Online Access: | https://eprints.nottingham.ac.uk/35557/ |
| _version_ | 1848795107057205248 |
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| author | Azzopardi, Barry J. Ijioma, Amadi Yang, Shounan Abdulkareem, Lokman A. Azzi, Abdelwahid Abdulkadir, Mukhtar |
| author_facet | Azzopardi, Barry J. Ijioma, Amadi Yang, Shounan Abdulkareem, Lokman A. Azzi, Abdelwahid Abdulkadir, Mukhtar |
| author_sort | Azzopardi, Barry J. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | From a study of the characteristics of structures across a 67/38 mm sudden contraction, using air/silicone oil flows, it has been found that frequencies of the structures (mainly slugs) persist across the contraction. This is in contrast to the velocities and lengths which increase as they move into the smaller diameter pipe. These observations were found for both vertical and 5° upward orientations. A similar persistence of frequency has been found from four other sources in the literature: a vertical (gradual) contraction; a horizontal Venturi; and two cases of horizontal pipe, 90° bend and vertical riser combination. The latter were at two contrasting conditions: (i) at atmospheric pressure with air/water in small diameter (34 mm) pipes; (ii) at 20 bar in larger diameter pipes (189 mm) using nitrogen and naphtha. |
| first_indexed | 2025-11-14T19:26:49Z |
| format | Article |
| id | nottingham-35557 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:26:49Z |
| publishDate | 2014 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-355572020-05-04T20:12:17Z https://eprints.nottingham.ac.uk/35557/ Persistence of frequency in gas–liquid flows across a change in pipe diameter or orientation Azzopardi, Barry J. Ijioma, Amadi Yang, Shounan Abdulkareem, Lokman A. Azzi, Abdelwahid Abdulkadir, Mukhtar From a study of the characteristics of structures across a 67/38 mm sudden contraction, using air/silicone oil flows, it has been found that frequencies of the structures (mainly slugs) persist across the contraction. This is in contrast to the velocities and lengths which increase as they move into the smaller diameter pipe. These observations were found for both vertical and 5° upward orientations. A similar persistence of frequency has been found from four other sources in the literature: a vertical (gradual) contraction; a horizontal Venturi; and two cases of horizontal pipe, 90° bend and vertical riser combination. The latter were at two contrasting conditions: (i) at atmospheric pressure with air/water in small diameter (34 mm) pipes; (ii) at 20 bar in larger diameter pipes (189 mm) using nitrogen and naphtha. Elsevier 2014-12 Article PeerReviewed Azzopardi, Barry J., Ijioma, Amadi, Yang, Shounan, Abdulkareem, Lokman A., Azzi, Abdelwahid and Abdulkadir, Mukhtar (2014) Persistence of frequency in gas–liquid flows across a change in pipe diameter or orientation. International Journal of Multiphase Flow, 67 . pp. 22-31. ISSN 0301-9322 Sudden contraction; Venturi; Bends; Gas/liquid; Void fraction; Frequency; Vertical; Inclined; ECT http://dx.doi.org/10.1016/j.ijmultiphaseflow.2014.03.010 doi:10.1016/j.ijmultiphaseflow.2014.03.010 doi:10.1016/j.ijmultiphaseflow.2014.03.010 |
| spellingShingle | Sudden contraction; Venturi; Bends; Gas/liquid; Void fraction; Frequency; Vertical; Inclined; ECT Azzopardi, Barry J. Ijioma, Amadi Yang, Shounan Abdulkareem, Lokman A. Azzi, Abdelwahid Abdulkadir, Mukhtar Persistence of frequency in gas–liquid flows across a change in pipe diameter or orientation |
| title | Persistence of frequency in gas–liquid flows across a change in pipe diameter or orientation |
| title_full | Persistence of frequency in gas–liquid flows across a change in pipe diameter or orientation |
| title_fullStr | Persistence of frequency in gas–liquid flows across a change in pipe diameter or orientation |
| title_full_unstemmed | Persistence of frequency in gas–liquid flows across a change in pipe diameter or orientation |
| title_short | Persistence of frequency in gas–liquid flows across a change in pipe diameter or orientation |
| title_sort | persistence of frequency in gas–liquid flows across a change in pipe diameter or orientation |
| topic | Sudden contraction; Venturi; Bends; Gas/liquid; Void fraction; Frequency; Vertical; Inclined; ECT |
| url | https://eprints.nottingham.ac.uk/35557/ https://eprints.nottingham.ac.uk/35557/ https://eprints.nottingham.ac.uk/35557/ |