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103/10/17 14:00 Prof. Wen-Yih Sun （商文義教授）（Dept. of Earth and Atmospheric Sciences, Purdue University, USA）演講
演講公告
張貼人：網站管理員 ╱ 公告日期：2014-10-07演 講 公 告
主講人：Prof. Wen-Yih Sun（商文義 教授）
地點：中央大學科學一館S-325教室
摘要：
講題：Numerical simulation of Rossby wave in shallow water
主講人：Prof. Wen-Yih Sun（商文義 教授）
Department of Earth, Atmospheric and Planetary Sciences, Purdue University, USA
時間：10月17日（星期五）下午2點
地點：中央大學科學一館S-325教室
摘要：
The semi-implicit, finite volume scheme developed by Sun [2011] has been applied to simulate Rossby waves in the equatorial ß-plane, discussed by Boyd [1980, 1985]. The scheme is simple, flexible, and more accurate compared with the finite volume, flux-form semi-Lagrangian (TFSL), Lax–Wendroff scheme, and others presented by Chu and Fan [2010]. Compared with the analytic solution, the scheme with the quadratic upstream interpolation for the convective kinetics (QUICK) and smoothing produces less dispersion than that with the 4th-order advection without smoothing, but the amplitude from QUICK is a little less than the latter. It is likely that accuracy can be increased if the mass-conserved semi-Lagrangain scheme [Sun 2007, Sun and Yeh 1997] is applied to the advection terms in this study.
The simulations also show that the effect of mountain does not have significant impact on the pattern of the soliton. The simulations confirm the perturbation theory that predicts solitary waves of large amplitude containing a region of recirculating fluid trapped within the moving disturbance, which can be well simulated with Dx = Dy = 0.2. The general patterns simulated from the zeroth-order and the sum of the zeroth and the first-order solutions as initial conditions remain very similar, although the detail and propagation speed are different.
最後修改時間：2014-10-07 PM 2:21
