Speaker: 王展研究员，中国科学院力学研究所

Inviter: 流体力学方程研究中心

Title: 隐匿于海面之下的轩然大波——非线性内波的理论、模型与计算

Language: Chinese

Time & Venue: 2025.04.10 10:30-11:30 南楼N204

Abstract: The general marine environment, characterized by the ‘wind-wave-current’ system, can give rise to phenomena such as typhoons, rogue waves, and internal waves, among other extraordinary situations. These events can significantly affect offshore engineering structures and pose risks to life and property in coastal areas. Given the characteristics of marine disasters in the South China Sea - the frequent occurrence of internal waves - we discuss the generation mechanism and propagation of internal solitary waves and their impact on marine engineering. In particular, we show that a large-amplitude internal solitary wave can excite a fully localized ‘rip’ region on the sea surface, called the ‘surface signature’ or ‘tide rip’ in the literature. This phenomenon is much like Bohr’s model of the hydrogen atom in the semi-classical limit in quantum mechanics. We will explain the reasons behind these unusual wave phenomena using modeling, numerical simulations, and multi-scale analysis. If time allows, we will extend the discussion of internal oceanic waves to the atmosphere, focusing on arched undular bores and the Kelvin wake.