Critical flow regions in tissue artificial heart valve assessed by laser doppler anemometer in continuous flow

Detalhes bibliográficos
Autor(a) principal: Pinotti,Marcos
Data de Publicação: 2006
Outros Autores: Faria,Edna M. de
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=S1678-58782006000300002
Resumo: Flow diagnosis using non-invasive techniques such laser Doppler anemometer (LDA) is an important tool to improve the design of artificial heart valves. In the present study, an experimental protocol to obtain flow velocity field and colour coded maps of turbulent eddies dimensions using LDA measurements in a 25 mm bovine pericardium bio prosthesis valve is reported. A transparent Plexiglas chamber was specially designed to allow optical access to the flow passing through the valve. Experiments were conducted for non-pulsate flow (to study the valve performance in the peak flow) for the aorta Reynolds number ranging from 3300 to 6800. LDA interrogation volume visited five thousand and one hundred points along the flow (2500 points upstream and 2600 points downstream) for each Reynolds number. Post-processing methodology was employed to obtain haemolytic potential colour-coded maps, which were related to turbulent quantities. It was observed that haemolytic regions tend to move downstream the valve when the flow rate is increased.
id ABCM-2_820c51d343e41fc1d50e55d68c43c422
oai_identifier_str oai:scielo:S1678-58782006000300002
network_acronym_str ABCM-2
network_name_str Journal of the Brazilian Society of Mechanical Sciences and Engineering (Online)
repository_id_str
spelling Critical flow regions in tissue artificial heart valve assessed by laser doppler anemometer in continuous flowLaser doppler anemometryartificial heart valvesteady flowbio prosthesisFlow diagnosis using non-invasive techniques such laser Doppler anemometer (LDA) is an important tool to improve the design of artificial heart valves. In the present study, an experimental protocol to obtain flow velocity field and colour coded maps of turbulent eddies dimensions using LDA measurements in a 25 mm bovine pericardium bio prosthesis valve is reported. A transparent Plexiglas chamber was specially designed to allow optical access to the flow passing through the valve. Experiments were conducted for non-pulsate flow (to study the valve performance in the peak flow) for the aorta Reynolds number ranging from 3300 to 6800. LDA interrogation volume visited five thousand and one hundred points along the flow (2500 points upstream and 2600 points downstream) for each Reynolds number. Post-processing methodology was employed to obtain haemolytic potential colour-coded maps, which were related to turbulent quantities. It was observed that haemolytic regions tend to move downstream the valve when the flow rate is increased.Associação Brasileira de Engenharia e Ciências Mecânicas - ABCM2006-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-58782006000300002Journal of the Brazilian Society of Mechanical Sciences and Engineering v.28 n.3 2006reponame:Journal of the Brazilian Society of Mechanical Sciences and Engineering (Online)instname:Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM)instacron:ABCM10.1590/S1678-58782006000300002info:eu-repo/semantics/openAccessPinotti,MarcosFaria,Edna M. deeng2006-08-18T00:00:00Zoai:scielo:S1678-58782006000300002Revistahttps://www.scielo.br/j/jbsmse/https://old.scielo.br/oai/scielo-oai.php||abcm@abcm.org.br1806-36911678-5878opendoar:2006-08-18T00:00Journal 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 Critical flow regions in tissue artificial heart valve assessed by laser doppler anemometer in continuous flow
title Critical flow regions in tissue artificial heart valve assessed by laser doppler anemometer in continuous flow
spellingShingle Critical flow regions in tissue artificial heart valve assessed by laser doppler anemometer in continuous flow
Pinotti,Marcos
Laser doppler anemometry
artificial heart valve
steady flow
bio prosthesis
title_short Critical flow regions in tissue artificial heart valve assessed by laser doppler anemometer in continuous flow
title_full Critical flow regions in tissue artificial heart valve assessed by laser doppler anemometer in continuous flow
title_fullStr Critical flow regions in tissue artificial heart valve assessed by laser doppler anemometer in continuous flow
title_full_unstemmed Critical flow regions in tissue artificial heart valve assessed by laser doppler anemometer in continuous flow
title_sort Critical flow regions in tissue artificial heart valve assessed by laser doppler anemometer in continuous flow
author Pinotti,Marcos
author_facet Pinotti,Marcos
Faria,Edna M. de
author_role author
author2 Faria,Edna M. de
author2_role author
dc.contributor.author.fl_str_mv Pinotti,Marcos
Faria,Edna M. de
dc.subject.por.fl_str_mv Laser doppler anemometry
artificial heart valve
steady flow
bio prosthesis
topic Laser doppler anemometry
artificial heart valve
steady flow
bio prosthesis
description Flow diagnosis using non-invasive techniques such laser Doppler anemometer (LDA) is an important tool to improve the design of artificial heart valves. In the present study, an experimental protocol to obtain flow velocity field and colour coded maps of turbulent eddies dimensions using LDA measurements in a 25 mm bovine pericardium bio prosthesis valve is reported. A transparent Plexiglas chamber was specially designed to allow optical access to the flow passing through the valve. Experiments were conducted for non-pulsate flow (to study the valve performance in the peak flow) for the aorta Reynolds number ranging from 3300 to 6800. LDA interrogation volume visited five thousand and one hundred points along the flow (2500 points upstream and 2600 points downstream) for each Reynolds number. Post-processing methodology was employed to obtain haemolytic potential colour-coded maps, which were related to turbulent quantities. It was observed that haemolytic regions tend to move downstream the valve when the flow rate is increased.
publishDate 2006
dc.date.none.fl_str_mv 2006-09-01
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=S1678-58782006000300002
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-58782006000300002
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1678-58782006000300002
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.28 n.3 2006
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_ 1754734680559583232

Registros relacionados