Xinyu Liu

Xinyu Liu is a DPhil student in Engineering Science at the University of Oxford, where his work is related to water waves theory. Before coming to Oxford, he studied Fire Protection and Safety Engineering at Southwest Jiaotong University. His broader academic interests include fluid mechanics, nonlinear wave theory, and theoretical and computational approaches to engineering problems. He is also involved in teaching in the Department of Engineering Science at Oxford.

Nonlinear water waves: theoretical and computational modelling of wave–wave interactions and bound harmonics in irregular wave fields

Wave–structure interactions: understanding nonlinear effects in offshore and coastal engineering applications

Spectral methods and efficient computation: development of fast algorithms for reconstructing higher-order wave components

• Phase manipulation and harmonic decomposition and reconstruction.
• Investigation of phase-manipulation techniques for separating linear and nonlinear wave components, and reconstruct an unseen phase of these.
• Variable Wavenumber Approximation (VWA)
• Formulation and validation of an approximation framework for nonlinear wave reconstruction across perturbation orders, water depths, directional spreading, for surface elevation and other surface kinematics. With extension to the inverse vwa, and the time series.
• Efficient computation of exact nonlinear wave interactions
• Development of fast spectral-domain methods for reconstructing higher-order bound wave components in irregular wave fields.
• Analytical research on free and bound behaviour in wavenumber–frequency tails
• Analytical study of the behaviour of free and bound wave components in the wavenumber–frequency tail region, with emphasis on their asymptotic structure and physical interpretation.