Decomposition model for naval hydrodynamic applications, Part II: Verification and validation. (15th July 2016)

• Record Type: Journal Article
• Authors: Vukčević, Vuko; Jasak, Hrvoje; Malenica, Šime
• Is Part Of: Ocean engineering. Volume 121(2016)
• Page Start: 76
• Page End: 88
• Publication Date: 2016-07-15
• Subjects: Decomposition model -- Numerical wave tank -- Vertical cylinder -- Higher-order wave loads -- OpenFOAM; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2016.05.021
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: This paper presents the verification and validation of the decomposition computational model presented in the accompanying paper. The decomposition model is primarily targeted to simulating incompressible, free surface flows in naval hydrodynamics related to wave-like phenomena. The model is implemented in foam-extend-3.1, a community driven fork of the OpenFOAM CFD software. The first set of tests considers regular wave propagation in a 2-D tank. Studies regarding Level Set parameters and reflection are carried out. Mass conservation during a long simulation is also considered. The solution is compared with non-linear potential flow solution obtained with stream-function wave theory for a range of wave steepness parameters. Higher-order wave loads on a vertical circular cylinder are calculated and compared to well-established non-linear potential flow results. Time refinement, mesh refinement and wave frequency studies are carried out and presented. Abstract : Highlights: Sensitivity analysis of 2-D wave propagation is carried out for dozen settings. Higher order forces on circular cylinder are compared to well-established results. Mesh refinement and time-step resolution studies are performed. Periodic convergence via moving window FFT is assessed for higher order forces.