Application of linear and non-linear k-ε models to flows around spur dikes

Peng Jing

Kawahara Yoshihisa

水工学論文集

This paper is concerned with three-dimensional numerical analysis of turbulent flows around submerged spur-dikes. A finite volume method is employed to discretize the governing equations. A nonlinear k-ε model proposed by Shih et al. and a linear k-ε model modified by Zhu-Shih are applied to two cases of flow with different spur dikes. The comparison with measured data shows that the nonlinear k-ε model reproduces mean velocity field better than the modified linear k-ε model in the two cases. The reason of the superiority of the non-linear model is discussed. It is shown, however, that further improvement in the numerical model is required to reproduce the complex flow phenomena accurately.

spur dikes

turbulent flow

linear k-ε model

non-linear k-ε model

three-dimensionality

建設工学・土木工学 [ 510 ]

英語

土木学会

[ISSN] 0916-7374

[NCID] AN10426673