Naslov
Rapid Free Surface Simulation for Steady-State Hull Resistance with FVM using OpenFOAM

Autori
Jasak, Hrvoje ; Vukcevic, Vuko ; Christ, Dominik

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Skup
30 Symposium on Naval Hydrodynamics

Mjesto i datum
Hobart, Australija, 02.11.2014. - 07.11.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Steady resistance; CFD; Volume of Fluid; OpenFOAM

Sažetak
This work describes a novel method to calculate resistance force at steady forward motion with free-surface simulation using the viscous turbulent flow model in Volume-Of-Fluid (VOF) formulation. Assuming quasi steady-state solution, equations for fluid flow and free-surface motion are decoupled due to separation of time-scales. It is thus possible to increase the time-step size by about 3 orders of magnitude and preserve numerical stability, which gives a substantial increase in computational efficiency. The method has been implemented and tested in FOAM-Extend, a fork of the OpenFOAM software. KCS and DTMB hull geometries are simulated with the novel method and results are compared with experimental data. The accuracy is equal to simulations with a conventional transient approach. Performance and parallel scalability are assessed. The results show that the novel method delivers substantially increased computational efficiency without sacrifice of accuracy.

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja

POVEZANOST RADA