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Advanced Lagrangian approaches to cavitation modelling in marine applications
Publikationstyp
Conference Paper
Date Issued
2011
Sprache
English
Institut
TORE-URI
Start Page
217
End Page
234
Citation
International Conference on Computational Methods in Marine Engineering (MARINE 2011)
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
Springer
© 2013 Springer Science+Business Media Dordrecht. The paper scrutinizes different approaches to cavitation modelling in the framework of volume of fluid based marine engineering Navier-Stokes simulations. Traditional Eulerian cavitation models compute the vapor content based on computationally efficient, semi-empirical mass-transfer models for cavitation. In conjunction with Lagrangian cavitation models, separate equations for the bubble size and momentum are solved for each individual bubble/nuclei of a dispersed vapor phase, and a subsequent mapping procedure provides the vapor-volume fraction of the Eulerian mixture. The paper aims to advocate the benefits of a combined approach, which reduces the computational effort of the Lagrangian approach whilst maintaining its enhanced predictive realm in critical flow regimes. Validation examples refer to 2D hydrofoils and outline the strong parameter dependency for the Eulerian cavitation models as well as its insensitivity to water-quality aspects. On the contrary, Lagrangian cavitation models return an improved accuracy and capture the influence of water quality. Results of an open-water propeller flow investigation confirm these findings and display a fair predictive agreement in conjunction with a combined modelling approach which allows to perform accurate cavitation predictions at reasonable cost.
Subjects
Cavitation
Computational methods
Euler-Euler
Euler-Lagrange
Marine engineering
DDC Class
004: Informatik
600: Technik
620: Ingenieurwissenschaften
More Funding Information
Deutschland, Bundesministerium für Wirtschaft und Technologie (BMWi; Grant Nr. 3SX286A)