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Title: The generation and evolution of internal solitary waves
Author: Liu, Zihua
ISNI:       0000 0004 9359 7378
Awarding Body: UCL (University College London)
Current Institution: University College London (University of London)
Date of Award: 2020
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This thesis is mainly concerned with mode-1 and mode-2 oceanic internal solitary waves. Theoretical analysis and numerical simulation are used to investigate the generation and evolution of these waves. The thesis is organised as follows. In chapter 2, we introduce the mathematical formulation used throughout the thesis. In chapter 3, we study the evolution of mode-1 internal solitary waves through an ocean current background, employing the variable-coefficient Korteweg-de Vries equation by concerning the effect of a background current. In chapter 4, we examine the possible generation of mode-2 waves by the interaction of mode-1 waves with topography, both in an ideal three-layer fluid system, a smooth density stratification and in two realistic oceanic settings, using a coupled linear long wave theory with mode coupling through topography, combined with evolution using a Korteweg-de Vries model. In chapter 5, we investigate the resonant coupling of mode-1 and mode-2 internal waves by topography, using a coupled Korteweg-de Vries model. In chapter 6, we present the interaction of a mode-1 internal solitary wave with a step topography with the generation of both mode-1 and mode-2 waves.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available