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

Jasak, Hrvoje and Vukčević, Vuko and Christ, Dominik (2014) Rapid Free Surface Simulation for Steady-State Hull Resistance with FVM using OpenFOAM. = Rapid Free Surface Simulation for Steady-State Hull Resistance with FVM using OpenFOAM. In: 30 Symposium on Naval Hydrodynamics, 2-7.11.2014., Hobart, Tasmanija.

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Abstract

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.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): Steady resistance ; CFD ; Volume of Fluid ; OpenFOAM
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: 08 Apr 2016 11:49
Last Modified: 03 Apr 2017 12:19
URI: http://repozitorij.fsb.hr/id/eprint/5538

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