Usable work of macro-scale cavities in liquids
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Society of Mechanical Sciences and Engineering (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-58782012000400008 |
Resumo: | It is shown that the generation of cavities in a liquid can produce usable work, which is illustrated by the stretching of a string. This work is done during the expansion of the cavity, and not with its collapse. Basic equations are presented for the movement of a device moved by the so called cavity events. A theoretical solution is also proposed, which uses polynomial functions relating the so called "excess of pressure" in the cavity and time. Evaluations of the force generated during the expansion of the cavity showed a mean peak value of about 58 N for the moving container, while measurements with the container fixed to a support showed a peak value of 476 N, considered somewhat overestimated, because high frequency oscillations seem to superpose the mean behavior. Simultaneous phenomena occurring during the cavity events are also described. Series of pictures of the experiments are presented. |
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Journal of the Brazilian Society of Mechanical Sciences and Engineering (Online) |
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Usable work of macro-scale cavities in liquidsmacro-scale cavitiesbubble dynamicsebullitioncavities' workIt is shown that the generation of cavities in a liquid can produce usable work, which is illustrated by the stretching of a string. This work is done during the expansion of the cavity, and not with its collapse. Basic equations are presented for the movement of a device moved by the so called cavity events. A theoretical solution is also proposed, which uses polynomial functions relating the so called "excess of pressure" in the cavity and time. Evaluations of the force generated during the expansion of the cavity showed a mean peak value of about 58 N for the moving container, while measurements with the container fixed to a support showed a peak value of 476 N, considered somewhat overestimated, because high frequency oscillations seem to superpose the mean behavior. Simultaneous phenomena occurring during the cavity events are also described. Series of pictures of the experiments are presented.Associação Brasileira de Engenharia e Ciências Mecânicas - ABCM2012-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-58782012000400008Journal of the Brazilian Society of Mechanical Sciences and Engineering v.34 n.4 2012reponame:Journal of the Brazilian Society of Mechanical Sciences and Engineering (Online)instname:Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM)instacron:ABCM10.1590/S1678-58782012000400008info:eu-repo/semantics/openAccessSchulz,Harry EdmarLombardi,GeraldoNascimento,Francisco Júlio doTrebi,Hélio José DonizetiSantos,Jorge Nicolau dosSimões,André Luiz Andradeeng2013-02-06T00:00:00Zoai:scielo:S1678-58782012000400008Revistahttps://www.scielo.br/j/jbsmse/https://old.scielo.br/oai/scielo-oai.php||abcm@abcm.org.br1806-36911678-5878opendoar:2013-02-06T00:00Journal of the Brazilian Society of Mechanical Sciences and Engineering (Online) - Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM)false |
dc.title.none.fl_str_mv |
Usable work of macro-scale cavities in liquids |
title |
Usable work of macro-scale cavities in liquids |
spellingShingle |
Usable work of macro-scale cavities in liquids Schulz,Harry Edmar macro-scale cavities bubble dynamics ebullition cavities' work |
title_short |
Usable work of macro-scale cavities in liquids |
title_full |
Usable work of macro-scale cavities in liquids |
title_fullStr |
Usable work of macro-scale cavities in liquids |
title_full_unstemmed |
Usable work of macro-scale cavities in liquids |
title_sort |
Usable work of macro-scale cavities in liquids |
author |
Schulz,Harry Edmar |
author_facet |
Schulz,Harry Edmar Lombardi,Geraldo Nascimento,Francisco Júlio do Trebi,Hélio José Donizeti Santos,Jorge Nicolau dos Simões,André Luiz Andrade |
author_role |
author |
author2 |
Lombardi,Geraldo Nascimento,Francisco Júlio do Trebi,Hélio José Donizeti Santos,Jorge Nicolau dos Simões,André Luiz Andrade |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Schulz,Harry Edmar Lombardi,Geraldo Nascimento,Francisco Júlio do Trebi,Hélio José Donizeti Santos,Jorge Nicolau dos Simões,André Luiz Andrade |
dc.subject.por.fl_str_mv |
macro-scale cavities bubble dynamics ebullition cavities' work |
topic |
macro-scale cavities bubble dynamics ebullition cavities' work |
description |
It is shown that the generation of cavities in a liquid can produce usable work, which is illustrated by the stretching of a string. This work is done during the expansion of the cavity, and not with its collapse. Basic equations are presented for the movement of a device moved by the so called cavity events. A theoretical solution is also proposed, which uses polynomial functions relating the so called "excess of pressure" in the cavity and time. Evaluations of the force generated during the expansion of the cavity showed a mean peak value of about 58 N for the moving container, while measurements with the container fixed to a support showed a peak value of 476 N, considered somewhat overestimated, because high frequency oscillations seem to superpose the mean behavior. Simultaneous phenomena occurring during the cavity events are also described. Series of pictures of the experiments are presented. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-12-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-58782012000400008 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-58782012000400008 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1678-58782012000400008 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Engenharia e Ciências Mecânicas - ABCM |
publisher.none.fl_str_mv |
Associação Brasileira de Engenharia e Ciências Mecânicas - ABCM |
dc.source.none.fl_str_mv |
Journal of the Brazilian Society of Mechanical Sciences and Engineering v.34 n.4 2012 reponame:Journal of the Brazilian Society of Mechanical Sciences and Engineering (Online) instname:Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) instacron:ABCM |
instname_str |
Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) |
instacron_str |
ABCM |
institution |
ABCM |
reponame_str |
Journal of the Brazilian Society of Mechanical Sciences and Engineering (Online) |
collection |
Journal of the Brazilian Society of Mechanical Sciences and Engineering (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Society of Mechanical Sciences and Engineering (Online) - Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) |
repository.mail.fl_str_mv |
||abcm@abcm.org.br |
_version_ |
1754734682231013376 |