Two-phase flow bubble detection method applied to natural circulation system using fuzzy image processing

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dc.contributor.authorBUENO, R.C.
dc.contributor.authorMASOTTI, P.H.F.
dc.contributor.authorJUSTO, J.F.
dc.contributor.authorANDRADE, D.A.
dc.contributor.authorROCHA, M.S.
dc.contributor.authorTORRES, W.M.
dc.contributor.authorMESQUITA, R.N. de
dc.coverageInternacionalpt_BR
dc.date.accessioned2018-11-27T12:02:27Z
dc.date.available2018-11-27T12:02:27Z
dc.date.issued2018pt_BR
dc.description.abstractNatural circulation cooling systems are currently used in new nuclear reactors. Over the last decades, research in these systems has focused in the study of flow and heat transfer parameters. A particular area of interest is the estimation of two-phase flow parameters by image processing and pattern recognition using intelligent processing. Several methods have been proposed to identify objects of interest in bubbly two-phase images. Edge detection is an important task to estimate flow parameters, in which the bubbles are segmented to obtain several features, such as void fraction, area, and diameter. However, current methods face difficulties in determining those parameters in high bubble-density two-phase flow images. Here, a new edge detection method is proposed to segment bubbles in natural circulation instability images. The new method (Fuzzy Contrast Standard Deviation – FUZCON) uses Fuzzy Logic and image standard deviation estimates of locally measured contrast levels. Images were obtained through an experimental circuit made of glass, which enables imaging flow patterns of natural circulation cycles at ambient pressure. The results indicated important improvements on edge detection efficiency for high void fraction estimation on high-density two-phase flow bubble images, when compared to classical detectors, without the need to use smoothing algorithms or human intervention.pt_BR
dc.format.extent255-264pt_BR
dc.identifier.citationBUENO, R.C.; MASOTTI, P.H.F.; JUSTO, J.F.; ANDRADE, D.A.; ROCHA, M.S.; TORRES, W.M.; MESQUITA, R.N. de. Two-phase flow bubble detection method applied to natural circulation system using fuzzy image processing. <b>Nuclear Engineering and Design</b>, v. 335, p. 255-264, 2018. DOI: <a href="https://dx.doi.org/10.1016/j.nucengdes.2018.05.026">10.1016/j.nucengdes.2018.05.026</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/29284.
dc.identifier.doi10.1016/j.nucengdes.2018.05.026pt_BR
dc.identifier.issn0029-5493pt_BR
dc.identifier.orcidaguardandopt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-5355-0925
dc.identifier.orcidhttps://orcid.org/0000-0002-6689-3011
dc.identifier.percentilfi77.94pt_BR
dc.identifier.percentilfiCiteScore67.67
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/29284
dc.identifier.vol335pt_BR
dc.relation.ispartofNuclear Engineering and Designpt_BR
dc.rightsopenAccesspt_BR
dc.subjectbubbles
dc.subjectcooling systems
dc.subjectdetection
dc.subjectfuzzy logic
dc.subjectimage processing
dc.subjectnatural convection
dc.subjectpattern recognition
dc.subjecttwo-phase flow
dc.subjectvoid fraction
dc.titleTwo-phase flow bubble detection method applied to natural circulation system using fuzzy image processingpt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorWALMIR MAXIMO TORRES
ipen.autorROBERTO NAVARRO DE MESQUITA
ipen.autorMARCIA SILVA DA ROCHA
ipen.autorDELVONEI ALVES DE ANDRADE
ipen.autorPAULO HENRIQUE FERRAZ MASOTTI
ipen.codigoautor188
ipen.codigoautor1375
ipen.codigoautor3754
ipen.codigoautor1258
ipen.codigoautor219
ipen.contributor.ipenauthorWALMIR MAXIMO TORRES
ipen.contributor.ipenauthorROBERTO NAVARRO DE MESQUITA
ipen.contributor.ipenauthorMARCIA SILVA DA ROCHA
ipen.contributor.ipenauthorDELVONEI ALVES DE ANDRADE
ipen.contributor.ipenauthorPAULO HENRIQUE FERRAZ MASOTTI
ipen.date.recebimento18-11pt_BR
ipen.identifier.fi1.541pt_BR
ipen.identifier.fiCiteScore3.0
ipen.identifier.ipendoc25071pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi1.500 - 2.999
ipen.range.percentilfi75.00 - 100.00
ipen.type.genreArtigo
relation.isAuthorOfPublication5e952755-d8a5-427d-9298-6d6b76897aac
relation.isAuthorOfPublication1975aa9b-be26-4f48-8196-96eeb4c2c0c3
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sigepi.autor.atividadeMASOTTI, P.H.F.:219:420:Spt_BR
sigepi.autor.atividadeANDRADE, D.A.:1258:420:Npt_BR
sigepi.autor.atividadeROCHA, M.S.:3754:-1:Npt_BR
sigepi.autor.atividadeTORRES, W.M.:188:450:Npt_BR
sigepi.autor.atividadeMESQUITA, R.N. DE:1375:420:Npt_BR
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