RG approach to the inviscid limit for shell models of turbulence

Autor:	Mailybaev, Alexei A.
Rok vydání:	2024
Předmět:	Mathematics - Analysis of PDEs Physics - Fluid Dynamics
Druh dokumentu:	Working Paper
Popis:	We consider an initial value problem for shell models that mimic turbulent velocity fluctuations over a geometric sequence of scales. Our goal is to study the convergence of solutions in the inviscid (more generally, vanishing regularization) limit and explain the universality of both the limiting solutions and the convergence process. We develop a renormalization group (RG) formalism representing this limit as dynamics in a space of flow maps. For the dyadic shell model, the RG dynamics has a fixed-point attractor, which determines universal limiting solutions. Deviations from the limiting solutions are also universal and given by a leading eigenmode (eigenvalue and eigenvector) of the linearized RG operator. Application to the Gledzer and Sabra shell models reveal the respective quasiperiodic and chaotic RG dynamics. Comment: 33 pages, 8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2408.04659 Zobrazit plný text záznamu View this record from Arxiv