| dc.contributor.author | Garcia, Valdemar | |
| dc.contributor.author | Sobrinho Teixeira, João Alberto | |
| dc.date.accessioned | 2010-04-30T09:58:27Z | |
| dc.date.available | 2010-04-30T09:58:27Z | |
| dc.date.issued | 2000 | |
| dc.description.abstract | The main purpose of this work was to analyse the transport f a solute dissolved in a flowing liquid in upward direction at low velocity along a vertical column, in the bottom of which slugs are injected. These experiments were carried out in a column with an internal diameter of 19 mm and height of 344.2 cm. Liquid flowrates of 1.0, 2.5 and 5.5 cm3/s were utilized, and an enlarged variety of gas flowrates were injected; in these conditions the slugs were normally formed at a frequency between 0.78 and 88.1 s-1. The scientific techniques used in this study based on the measurement, at the top of the column, of a tracer solution injected in its bottom. A simplified physical model was developed to explain the results obtained, which was based on two hypotheses: (i) the flow of the liquid between two slugs is laminar, being the respective profile of velocity approximate to the Poiseuille law; (ii) the stirring action provoked by each slug in the liquid is limited to a small region, the wake of slug, which can be taken as a “perfectly mixed tank”. One of the most relevant conclusions derived from this work and which at first analysis would appear paradoxical, is that, it is possible to proceed in such a way that the bubbling of gas through a liquid will provoke less dispersion in the residence time of liquid than which would be obtained in the absence of the introduction of gas. | pt |
| dc.identifier.citation | Garcia, Valdemar; Teixeira, João Sobrinho (2000). Gas-liquid flow dispersion in a vertical pipe. Recent advances in transport phenomena. Elsevier. p. 69-74. ISBN 9782842992071 | pt |
| dc.identifier.isbn | 9782842992071 | |
| dc.identifier.uri | http://hdl.handle.net/10198/2268 | |
| dc.language.iso | eng | pt |
| dc.publisher | Elsevier | pt |
| dc.subject | Gas-liquid flow | pt |
| dc.subject | Slugs | pt |
| dc.subject | Wake of slug | pt |
| dc.subject | Dispersion | pt |
| dc.subject | Vertical tube | pt |
| dc.title | Gas-liquid flow dispersion in a vertical pipe | pt |
| dc.type | book part | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Paris | pt |
| oaire.citation.endPage | 74 | pt |
| oaire.citation.startPage | 69 | pt |
| oaire.citation.title | Recent Advances in Transport Phenomena | pt |
| person.familyName | Garcia | |
| person.familyName | Sobrinho Teixeira | |
| person.givenName | Valdemar | |
| person.givenName | João Alberto | |
| person.identifier.orcid | 0000-0002-3941-2438 | |
| person.identifier.orcid | 0000-0001-5496-7514 | |
| rcaap.rights | openAccess | pt |
| rcaap.type | bookPart | pt |
| relation.isAuthorOfPublication | f9422279-4412-49c2-becd-1e696a8c5c4b | |
| relation.isAuthorOfPublication | 6b98d524-3763-4ca3-917b-33f0126e63ca | |
| relation.isAuthorOfPublication.latestForDiscovery | 6b98d524-3763-4ca3-917b-33f0126e63ca |
