Reduced One-Dimensional Models for Wave Turbulence System
- 21 Downloads
While studying many wave turbulence (WT) phenomena, owing to their inherent complexity, one frequently encounters the necessity of uncertainty quantification (UQ) in high dimension. The implementation of many existing algorithms for the UQ under these circumstances demands a vast amount of computation and, as a consequence, the straightforward approach tends to be infeasible or impractical. One effort to circumvent this obstacle in high dimension is to find an effective dimension reduction procedure for the probability distribution of the dynamical system model. One of the methodologies to do this is to replace the true Markovian model with a simple stochastic model that is significantly more amenable to the UQ than the underlying system. The procedure can be carried out via approximating the original equation for each Fourier mode by an independent and analytically tractable stochastic differential equation. In this work, we introduce a new approach for the so-called reduced-order model strategy within the context of the Majda–McLaughlin–Tabak model. Our framework makes use of a detailed analysis of the one-dimensional WT prototype to build a family of simplified models. Furthermore, the adaptive parameters are tuned without performing a direct numerical simulation of the true dynamical system model.
KeywordsWave turbulence Majda–McLaughlin–Tabak model Reduced-order model strategy Mori–Zwanzig projection theory Mean-field argument Random frequency modulation
Mathematics Subject Classification74J30 82B31 60G10
This work is supported by the Early Career Scheme of Hong Kong, Project No. 9048086 (CityU 21302416), and the Strategic Research Grant of City University of Hong Kong (No. 7004971 and No. 7005133). The author thanks Professor David Cai for helpful discussions and suggestions. The author also thanks the anonymous referees for their helpful comments and suggestions, which indeed contributed to improving the quality of the publication.
- Salmon, R.: Lectures on Geophysical Fluid Dynamics. Oxford University Press, Oxford (1998)Google Scholar
- Zakharov, V., L’vov, V., Falkovich, G.: Kolmogorov spectra of turbulence 1. Wave turbulence. Kolmogorov spectra of turbulence 1. Wave turbulence., by Zakharov, VE; L’vov, VS; Falkovich, G. Springer, Berlin, p. 275 (1992). ISBN: 3-540-54533-6, 1Google Scholar