Acta Mechanica Sinica

, Volume 32, Issue 3, pp 351–361

Identification, characterization and evolution of non-local quasi-Lagrangian structures in turbulence

Research Paper

DOI: 10.1007/s10409-015-0555-x

Cite this article as:
Yang, Y. Acta Mech. Sin. (2016) 32: 351. doi:10.1007/s10409-015-0555-x

Abstract

The recent progress on non-local Lagrangian and quasi-Lagrangian structures in turbulence is reviewed. The quasi-Lagrangian structures, e.g., vortex surfaces in viscous flow, gas-liquid interfaces in multi-phase flow, and flame fronts in premixed combustion, can show essential Lagrangian following properties, but they are able to have topological changes in the temporal evolution. In addition, they can represent or influence the turbulent flow field. The challenges for the investigation of the non-local structures include their identification, characterization, and evolution. The improving understanding of the quasi-Lagrangian structures is expected to be helpful to elucidate crucial dynamics and develop structure-based predictive models in turbulence.

Keywords

Turbulence Lagrangian study Coherent structure  Multi-scale analysis Vortex dynamics 

Copyright information

© The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.State Key Laboratory for Turbulence and Complex Systems (LTCS) and Center for Applied Physics and Technology (CAPT), College of EngineeringPeking UniversityBeijingChina