ABSTRACT
Joon-Woo Noh Korea Institute of Water and Environment, Daejon, Korea
ABSTRACT: The main objective of this study is to develop efficient and accurate 3D finite element model for hydrodynamic channel flow simulation. To establish governing equation considering turbulent flows, the fundamental 3D Navier-Stokes equation is modified as Reynolds equation. In the governing equation turbulent flow characteristics are expressed using the Smagorinsky scheme in horizontal plan and the Mellor-Yamada scheme for vertical direction. The proposed model adopted the Streamline Upwind/Petrov Galerkin scheme for weighting function in model formulation and moving boundary condition to overcome the limitations of fixed grid. For model validation, the proposed 3D finite element model has been applied for U typed channel flow and compared with the results of existing model to show a good agreement between two models. The simulation results using this model successfully describe 3D flow characteristics for various channel flows with consideration of turbulent flows. Adopting moving boundary conditions in describing water surface variations it is possible to obtain stable and accurate numerical solutions.
