Circular Free Jets: CFD Simulations with Various Turbulence Models and Their Comparison with Theoretical Solutions

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dc.contributor.authorKmecová, Miroslavacs
dc.contributor.authorŠikula, Ondřejcs
dc.contributor.authorKrajčík, Michalcs
dc.coverage.issue1cs
dc.coverage.volume471cs
dc.date.accessioned2019-04-03T03:55:06Z
dc.date.available2019-04-03T03:55:06Z
dc.date.issued2019-02-25cs
dc.description.abstractThe theory of turbulent free jet is fundamental for the design of comfort ventilation, as free jets frequently occur in mixing and personalized ventilation systems and their characteristics strongly influence the air quality in the breathing zone of an occupant. The aim of this research is to provide recommendations that help researchers and practitioners improve the accuracy and reliability of their computational models of ventilation systems involving circular free jets. To accomplish this, a review of existing theoretical calculation models is performed, and these models are subsequently investigated by computational fluid dynamics. The theoretical solutions of free jets are compared with CFD simulations using various turbulent models such as the standard k-epsilon model, the k-epsilon realizable model, the standard k-omega model, the shear stress transport (SST) k-omega model, and the Reynolds stress model (RSM). The simulated models are represented by profiles of the centreline velocity for a free jet emanating from a round nozzle, because such presentation of the data proved to be particularly helpful for the comparison of the turbulence models. The k-omega SST turbulence closure scheme with standard coefficients produced results of the centreline velocity closest to the average of theoretical solutions investigated, whereas the discrepancy between the simulations and the theoretical models was about 60 % with the k-epsilon standard turbulence model.en
dc.formattextcs
dc.format.extent1-8cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationIOP Conference Series: Materials Science and Engineering. 2019, vol. 471, issue 1, p. 1-8.en
dc.identifier.doi10.1088/1757-899X/471/6/062045cs
dc.identifier.issn1757-899Xcs
dc.identifier.other155821cs
dc.identifier.urihttp://hdl.handle.net/11012/138146
dc.language.isoencs
dc.publisherIOP Publishing Ltdcs
dc.relation.ispartofIOP Conference Series: Materials Science and Engineeringcs
dc.relation.urihttps://iopscience.iop.org/article/10.1088/1757-899X/471/6/062045cs
dc.rightsCreative Commons Attribution 3.0 Unportedcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1757-899X/cs
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/cs
dc.subjectfree stream; CFD simulationen
dc.subjectturbulence modelsen
dc.subjectcomparisonen
dc.titleCircular Free Jets: CFD Simulations with Various Turbulence Models and Their Comparison with Theoretical Solutionsen
dc.type.driverconferenceObjecten
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-155821en
sync.item.dbtypeVAVen
sync.item.insts2020.03.31 00:58:46en
sync.item.modts2020.03.30 22:58:56en
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav technických zařízení budovcs
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. AdMaS EGAR - Technické zařízení budovcs
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