| dc.description.abstract | Numerical simulations have been routinely applied in marine design for the past decades. The limitations of this approach lie in the requirement of high computational power and the developmetn of computer technologies especially in the pre and post processing. For some numerical schemes, the computation cost can be very high. However, with rapid development in computational capability in recent years, these limitations are slowly vanishing. Many simulation schemes for modeling turbulent flow have been developed such as Reynolds-Averaged Naver Stokes (RANS) and Partially Reynolds-Averaged Navier Stokes (PANS). RANS methods can generate precise simulations for flows with small scale turbulence at an acceptable computational cost. However, due to the limitation in distinguishing large and small scale motion, this method is not suitable for large scale turbulence. While PANS methods can solve both large and small scale turbulence, the computational cost is higher compared to RANS methods. In this research project, numerical wave tanks with a heaving buoy using laminar simulations are presented to study the complex motions in an incompressible two-phase flow . The simulations are generated using the interFoam solver, which is embedded in OpenFOAM and provides solutions to multiphase incompressible flow with optional mesh motion. The main outcomes of these simulations are time series of waves measured at upstream and downstream of the buoy and the buoy response motions. The results of these simulations are compared to previous experiment as well as numerical RANS and PANS simulations conducted by other members of the Furth Lab. | |
