Interactions of fully nonlinear waves with submerged bodies by a 2D viscous NWT Conference Paper uri icon


  • A 2D viscous NWT (Numerical Wave Tank) code based on Navier-Stokes equations by a multi-block FDM/FVM hybrid method has been developed to investigate the interactions of fully nonlinear regular waves with stationary two-dimensional bodies. The CFD code is applied to the case of submerged circular cylinder and extensively tested against published computational and experimental results. The multi-block hybrid method uses rectangular-grid-structured FDM (Finite Difference Method) at far field and body-fitted-coordinate-structured FVM (Finite Volume Method) in the near field. The two solutions are matched in a narrow overlap region assuring the continuity of pressure and velocities. The fully nonlinear free-surface conditions are satisfied through a density-function equation. The NWT is able to reproduce with high accuracy the nonlinear interactions of free-surface viscous flows around arbitrary 2D bodies as long as the turbulence phenomena are not important. The flow simulations for a submerged circular cyl inder are able to reproduce, through advanced computer graphics software, various interesting features observed in the physical experiments for a variety of KC (Keulegan Carpenter) numbers. The developed computer program is proved to be robust and efficient in simulating more complicated flow problems including multiple bodies and bodies in motion.

published proceedings

  • Proceedings of the International Offshore and Polar Engineering Conference

author list (cited authors)

  • Tavassoli, A., & Kim, M. H.

complete list of authors

  • Tavassoli, A||Kim, MH

publication date

  • January 2001