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Fundamental mode of freely decaying laminar swirling flows
TEMPO, UVHC, Campus Mont Houy, 59313 Valenciennes Cedex 9, France.
University of Iceland, Sæmundargötu 2, Reykjavík 101, Iceland.
EMPO, UVHC, Campus Mont Houy, Valenciennes Cedex 9, France.
Högskolan Väst, Institutionen för teknik, matematik och datavetenskap, Avd för maskinteknik. (PTW Welding)ORCID-id: 0000-0003-2535-8132
Vise andre og tillknytning
2016 (engelsk)Inngår i: Applied Mathematical Modelling, ISSN 0307-904X, E-ISSN 1872-8480, Vol. 40, nr 13-14, s. 6218-6233Artikkel i tidsskrift (Fagfellevurdert) Published
Resurstyp
Text
Abstract [en]

Abstract A detailed study of a swirling flow in a tube is presented in the first part of the paper. A simplified analytical solution of the governing equations indicates specific modes of the tangential velocity and that the decay of the swirl effect is exponential. The problem is then solved in three dimensions using computational fluid dynamics (CFD) and a comparison with analytical expressions shows that the CFD code is reliable in terms of accuracy. The CFD results confirm that a fundamental swirling mode is reached within a short distance from the inlet. The torque swirl number is introduced to physically estimate the intensity of the swirl. A companion value is given: it is the average deviation.

sted, utgiver, år, opplag, sider
2016. Vol. 40, nr 13-14, s. 6218-6233
Emneord [en]
Laminar, Decay, Swirl, Analytical, Boundary condition, OpenFOAM
HSV kategori
Forskningsprogram
TEKNIK, Produktions- och materialteknik; TEKNIK, Matematik
Identifikatorer
URN: urn:nbn:se:hv:diva-9299DOI: 10.1016/j.apm.2016.02.002ISI: 000377921900002Scopus ID: 2-s2.0-84966430130OAI: oai:DiVA.org:hv-9299DiVA, id: diva2:917763
Merknad

Available online 12 February 2016

Funders: Université de Valenciennes et du Hainaut-Cambrésis.

Tilgjengelig fra: 2016-04-07 Laget: 2016-04-07 Sist oppdatert: 2019-02-11bibliografisk kontrollert

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