Comparing a range of impellers for "stirring as foam disruption"
The effectiveness of a range of impellers for "stirring as foam disruption" (SAFD) is assessed in a vessel of 0.72 m diameter and an aspect ratio of 2: 1. Measurement of power drawn by the impeller achieving SAFD and of the three-dimensional flow field close to the dispersion surface are b...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2002
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| _version_ | 1826272975679127552 |
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| author | Boon, L Hoeks, F van der Lans, R Bujalski, W Wolff, M Nienow, A |
| author_facet | Boon, L Hoeks, F van der Lans, R Bujalski, W Wolff, M Nienow, A |
| author_sort | Boon, L |
| collection | OXFORD |
| description | The effectiveness of a range of impellers for "stirring as foam disruption" (SAFD) is assessed in a vessel of 0.72 m diameter and an aspect ratio of 2: 1. Measurement of power drawn by the impeller achieving SAFD and of the three-dimensional flow field close to the dispersion surface are both used to explain the findings along with the global gas hold-up. A large radial flow Rushton turbine can disrupt foam at a great height but requires high power. Down-pumping hydrofoils are only effective when the ungassed liquid height is below the level of the impeller employed to disrupt foam. Up-pumping hydrofoils are the most effective because their flow pattern gives rise to high velocities across the dispersion surface, which are able to entrain foam in the downflow generated at the walls. © 2002 Elsevier Science B.V. All rights reserved. |
| first_indexed | 2024-03-06T22:21:04Z |
| format | Journal article |
| id | oxford-uuid:5511edad-9117-4344-ae61-ca826c5d4fd5 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:21:04Z |
| publishDate | 2002 |
| record_format | dspace |
| spelling | oxford-uuid:5511edad-9117-4344-ae61-ca826c5d4fd52022-03-26T16:41:43ZComparing a range of impellers for "stirring as foam disruption"Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5511edad-9117-4344-ae61-ca826c5d4fd5EnglishSymplectic Elements at Oxford2002Boon, LHoeks, Fvan der Lans, RBujalski, WWolff, MNienow, AThe effectiveness of a range of impellers for "stirring as foam disruption" (SAFD) is assessed in a vessel of 0.72 m diameter and an aspect ratio of 2: 1. Measurement of power drawn by the impeller achieving SAFD and of the three-dimensional flow field close to the dispersion surface are both used to explain the findings along with the global gas hold-up. A large radial flow Rushton turbine can disrupt foam at a great height but requires high power. Down-pumping hydrofoils are only effective when the ungassed liquid height is below the level of the impeller employed to disrupt foam. Up-pumping hydrofoils are the most effective because their flow pattern gives rise to high velocities across the dispersion surface, which are able to entrain foam in the downflow generated at the walls. © 2002 Elsevier Science B.V. All rights reserved. |
| spellingShingle | Boon, L Hoeks, F van der Lans, R Bujalski, W Wolff, M Nienow, A Comparing a range of impellers for "stirring as foam disruption" |
| title | Comparing a range of impellers for "stirring as foam disruption" |
| title_full | Comparing a range of impellers for "stirring as foam disruption" |
| title_fullStr | Comparing a range of impellers for "stirring as foam disruption" |
| title_full_unstemmed | Comparing a range of impellers for "stirring as foam disruption" |
| title_short | Comparing a range of impellers for "stirring as foam disruption" |
| title_sort | comparing a range of impellers for stirring as foam disruption |
| work_keys_str_mv | AT boonl comparingarangeofimpellersforstirringasfoamdisruption AT hoeksf comparingarangeofimpellersforstirringasfoamdisruption AT vanderlansr comparingarangeofimpellersforstirringasfoamdisruption AT bujalskiw comparingarangeofimpellersforstirringasfoamdisruption AT wolffm comparingarangeofimpellersforstirringasfoamdisruption AT nienowa comparingarangeofimpellersforstirringasfoamdisruption |