Simulacija udarnih valnih opterećenja u OpenFOAM-u

Gatin, Inno and Vukčević, Vuko and Jasak, Hrvoje (2014) Simulacija udarnih valnih opterećenja u OpenFOAM-u. = Simulation of Wave Impact Loads in OpenFOAM. In: XXI. simpozij Teorija i praksa brodogradnje, in memoriam prof. Leopold Sorta = The 21st symposium Theory and practice shipbuilding, in memoriam prof. Leopold Sorta, 02-04.10.2014., Baška; Croatia.

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Abstract (Croatian)

Tema ovog rada je primjena numeričkih proračuna udarnih valnih opterećenja na nepomične konstrukcije pomorske tehnike. Korišten je programski paket Naval Hydro Pack u programu OpenFOAM. Korišten je model dvofaznog strujanja sa slobodnom površinom pomoću “Volume of Fluid” metode i “Level Set” metode. Jednadžbe su diskretizirane metodom kontrolnih volumena. Ukratko je prikazan način modeliranja valova pomoću relaksacijskih zona. Proveden je proračun opterećenja kvadratnog stupa uslijed udarnog vodenog vala te su rezultati uspoređeni s eksperimentalnim vrijednostima. Prikazan je način generiranja ekstremnog vala (engl. „freak wave“) pomoću fokusiranja valnih komponenti standardnog spektra energije valova. Provedena je simulacija ekstremnog vala te su prikazani rezultati proračuna.

Abstract

This paper presents numerical simulation of wave loads on static offshore structures. The Naval Hydro Pack in OpenFOAM is used. Two phase free surface flow model is used with Volume of Fluid and Level Set method for interface capturing. Governing equations are discretized using the Finite Volume Method. Wave modelling with relaxation zones is described. Simulation of 3D dam break with fixed square column is carried out. Results are compared with corresponding experimental data. Next, a method for freak wave initialization using wave focusing is given. Wave components are obtained using standard wave energy spectra. Simulation of freak wave is shown.

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: OpenFOAM; metoda kontrolnih volumena; udarna valna opterecenja; relaksacijske zone; ekstremni val
Keywords (Croatian): OpenFOAM; finite volume method; wave impact loads; relaxation zones; freak wave
Subjects: TECHNICAL SCIENCE > Shipbuilding
Divisions: 500 Department of Energy, Power Engineering and Environment > 530 Chair of Turbomachinery
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 15 May 2015 09:26
Last Modified: 06 Apr 2017 12:17
URI: http://repozitorij.fsb.hr/id/eprint/4158

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