Numerical simulation of wave loading on static offshore structures

Jasak, Hrvoje and Gatin, Inno and Vukčević, Vuko (2014) Numerical simulation of wave loading on static offshore structures. = Numerical simulation of wave loading on static offshore structures. In: 11th. World Congress on Computational Mechanics - WCCM XI 5th. European Congress on Computational Mechanics - ECCM V 6th European Congress on Computational Fluid Dynamics - ECFD VI, 20-25.07.2014., Barcelona; Spain.

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This paper presents numerical simulations with dominant free surface effects. Wave loads exerted on static offshore structures are calculated. Simulations are carried out using Finite Volume Method (FVM). Mathematical model of two phase incompressible flow is based on Naiver-Stokes equations. Volume of Fluid (VOF) 4 method is used for interface capturing. Waves are generated using relaxation zones principle 3. Pressure-velocity coupling is obtained by PIMPLE algorithm, a combination of SIMPLE and PISO algorithm. It allows calculations with higher Courant numbers, reducing required computational time. Simulations are calculated with OpenFOAM software package. The method is validated with two test cases. In first simulation truncated vertical cylinder immersed in water is exposed to incoming waves. Forces on cylindrical column are calculated. Five cases of harmonic waves with different frequencies and wave heights are investigated. Data is compared with experimental results from 2. The forces on the column in the direction of wave propagation show good agreement with experimentally measured forces. The second case describes freak wave initialization and simulation. Finally it is concluded that CFD simulations for given cases give acceptably accurate results.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): Computational mechanics; Cylinders (shapes); Finite volume method; Incompressible flow; Numerical models; Offshore structures; Structural loads; Two phase flow; Wave propagation; Computational time; Different frequency; Free surface effect; Interface capturing; OpenFOAM; Pressure-velocity coupling; Volume of fluids; Wave load; Computational fluid dynamics
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
Citations SCOPUS: 0 (12.09.2017.)
Date Deposited: 27 May 2015 12:56
Last Modified: 12 Sep 2017 11:09

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