Author(s): Jin Woo Lee; Jong Wook Lee; Yong-Sik Cho
Linked Author(s): Yong-Sik Cho
Keywords: Free surface flows; Non-hydrostatic pressure; Pressure boundary condition; Wave Propagation
Abstract: In this paper, we present a three-dimensional non-hydrostatic pressure model for free surface flows using a normalized vertical coordinate system. To strongly couple the free surface and non-hydrostatic pressure with the momentum equations, a double predictor-corrector method (Chen, 2003) is employed. This research is especially focused on implementing the dynamic boundary condition -- a zero pressure condition at the free surface if atmospheric pressure is ignored. It is shown that this boundary condition can be specified easily with a slight modification to existing models (Casulli, 1999). It is also shown that the proposed method is less dependent of a number of vertical layers used and more accurate than the existing models.
Year: 2009