Recent advances in EdgeCFD on wave-structure interaction and turbulence modeling Renato N. Elias ',Alvaro L. G. A. Coutinho " Milton A. Jr. 1, Adriano M. A. Cortes 1, Jose L. Drummond Alves 2, Nestor O. Guevara Jr. 2, Carlos E. Silva 2, Bruno Correa 2, Fernando A. Rochinha 3, Gabriel M. Guerra Bernada 3, Erb F. Lins 3 and Daniel F. de Carvalho e Silva 4 I High Performance Computing Center, COPPE/Federal University of Rio de janeiro, Rio de janeiro, RJ. Brazil 2 Laboratory for Computational Methods in Engineering, COPPE/Federal University of Rio de janeiro, Rio de janeiro, RJ. Brazil 3 Mechanical Engineering Program, COPPE/Federal University of Rio de janeiro, Rio de janeiro, RJ. Brazil 4 PETROBRAS Research Center Rio de janeiro, RJ. Brazil Abstract The computation of free surface flows is challenging since waves are highly nonlinear and commonly present merging, frag- mentation and cusps, leading to the use of interface capturing ALE approaches, Turbulence is also important on several offshore applications, In this work we report recent advances of EdgeCFD to simulate these problems, EdgeCFD is a fully implicit 3D incompressible stabilized parallel edge-based finite element flow solver associated to the Volume-of-Fluid (VoF) method. The VoF marking function is also solved by a fully implicit parallel edge-based finite element formulation. Turbulence in EdgeCFD is treated within the Large Eddy Simulation (LES) framework. The performance and accuracy ofEdgeCFD is tested in the simu- lation waves and in the interaction between waves and a semisubmersible structure. We also access the performance of several LES models on the simulation of the flow around a cylinder at Reynolds 3,900. Keywords Turbulence, free surface flows, wave simulation, stabilized finite element method, large eddy simulation. 1 Introduction Fuel or water sloshing in tanks, waves breaking in ships, offshore platforms motions, wave action on harbors and coastal areas are some of the problems in hydrodynamics in which complex flows involving waves and free surface occur. The main computational challenge when solving such highly nonlinear problem is determining the evolution of the water/air interface location. There are a large number of numerical methods devoted to the computation of free-surface problems. These methods are frequently classified as interface tracking and interface capturing methods. Manuscript submitted to MS&OTon August 05.2013. Accepted on February 03,2014. Editor: MarceloA. S. Neves. Artkie posted onJjne on August 05. 2013 on August 26. 2014: URL: www.sobena.orgbr/msot/voiume.htm . Vol. 9 No. 1 pp. 49·58 June 2014 Marine Systems & Ocean Technology 49