Influence of Second Viscosity on Pressure Pulsation

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dc.contributor.authorHimr, Danielcs
dc.contributor.authorHabán, Vladimírcs
dc.contributor.authorFialová, Simonacs
dc.coverage.issue24cs
dc.coverage.volume9cs
dc.date.issued2019-12-12cs
dc.description.abstractA mathematical model of pulsating flow is proposed in the paper. The model includes more accurate description of energy dissipation, so it allows, for example, better stability analysis of water power plant control and more effective operation. Flow in a pipeline system is usually treated as a one-dimensional flow. This is also applied for more difficult cases of the Newtonian and non-Newtonian liquids simulations in the rigid or flexible pipes. Computational simulations of pressure pulsations in pipelines often predict lower damping than what the experimental results show. This discrepancy can be caused by neglecting one of the important damping mechanisms. The second viscosity describes the energy losses due to the compressibility of the liquid. Its existence and use in the computations specifies the real pulsations damping descriptions and predictions. A frequency dependent model of pressure pulsations including second viscosity is introduced. The second viscosity is determined from the system eigenvalue. The experiments were performed with water for low frequencies (from 0.1 to 1 kHz). This area is not fully covered by the current available research results.en
dc.description.abstractA mathematical model of pulsating flow is proposed in the paper. The model includes more accurate description of energy dissipation, so it allows, for example, better stability analysis of water power plant control and more effective operation. Flow in a pipeline system is usually treated as a one-dimensional flow. This is also applied for more difficult cases of the Newtonian and non-Newtonian liquids simulations in the rigid or flexible pipes. Computational simulations of pressure pulsations in pipelines often predict lower damping than what the experimental results show. This discrepancy can be caused by neglecting one of the important damping mechanisms. The second viscosity describes the energy losses due to the compressibility of the liquid. Its existence and use in the computations specifies the real pulsations damping descriptions and predictions. A frequency dependent model of pressure pulsations including second viscosity is introduced. The second viscosity is determined from the system eigenvalue. The experiments were performed with water for low frequencies (from 0.1 to 1 kHz). This area is not fully covered by the current available research results.en
dc.formattextcs
dc.format.extent1-12cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationApplied Sciences-Basel. 2019, vol. 9, issue 24, p. 1-12.en
dc.identifier.doi10.3390/app9245444cs
dc.identifier.issn2076-3417cs
dc.identifier.orcid0000-0003-4500-8631cs
dc.identifier.orcid0000-0002-5445-3537cs
dc.identifier.orcid0000-0002-8776-4219cs
dc.identifier.other160853cs
dc.identifier.researcheridR-4959-2017cs
dc.identifier.scopus55823004900cs
dc.identifier.scopus15729076600cs
dc.identifier.scopus54943181000cs
dc.identifier.urihttp://hdl.handle.net/11012/184120
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofApplied Sciences-Baselcs
dc.relation.urihttps://www.mdpi.com/2076-3417/9/24/5444cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2076-3417/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectSecond viscosityen
dc.subjectdampingen
dc.subjectpressure pulsationen
dc.subjectfrequency domainen
dc.subjectSecond viscosity
dc.subjectdamping
dc.subjectpressure pulsation
dc.subjectfrequency domain
dc.titleInfluence of Second Viscosity on Pressure Pulsationen
dc.title.alternativeInfluence of Second Viscosity on Pressure Pulsationen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-160853en
sync.item.dbtypeVAVen
sync.item.insts2025.10.14 14:52:38en
sync.item.modts2025.10.14 10:53:26en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. EÚ-odbor fluidního inženýrství Viktora Kaplanacs
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EÚ-odbor fluidního inženýrství Viktora Kaplana