Author(s): Jian Liu; Akihiro Tominaga
Linked Author(s): Akihiro Tominaga
Keywords: No Keywords
Abstract: An extended depth-averaged k-ε turbulence model is proposed for simulating the flow in a channel constricted by cofferdams. In the present paper, the coefficient C_μ is expressed as a function of shear strain rate scale S and vorticity scale Ω to eliminate the excessive production of turbulent kinetic energy around a stagnation point. The model constants C_1, C_2 in the ε-equation are modified as functional forms of time scales G/ε and Sk/ε to account for non-equilibrium effects. Three-dimensional effects are considered by modifying the friction coefficient in bottom shear stresses. The computed solutions are compared with experimental data. The agreement between the calculated and experimental results is quite satisfactory.
Year: 1997