Journal ArticleDOI
Investigation of correlation between vorticity, Q, λci, λ2, Δ and Liutex
TLDR
Liutex was proposed as a vector indicator of vortex in this article, where the direction of Liutex represents the swirling axis and the magnitude of L 2 is defined as twice the angular speed of rotation.About:
This article is published in Computers & Fluids.The article was published on 2021-07-15. It has received 15 citations till now. The article focuses on the topics: Vorticity & Vortex.read more
Citations
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Turbulent Mixing and Transition Criteria of Flows Induced by Hydrodynamic Instabilities
TL;DR: In this paper, a pedagogical review of hydrodynamic instability-induced turbulent flows is presented, with a focus on the initial conditions of such flows and accurately predicting the transitional flows.
Journal ArticleDOI
Correlation analysis between underwater noise and Liutex for DTMB4119 propeller
Lianbo Yu,Jianwei Wu,Decheng Wan +2 more
Journal ArticleDOI
Influence of Upstream Disturbances on the Vortex Structure of Francis Turbine Based on the Criteria of Identification of Various Vortexes
Tao Guo,Lihui Xu,Wenquan Wang +2 more
TL;DR: In this paper, the authors conduct a simulation that adopts sliding grid technology and the large-eddy simulation (LES) method based on the wall-adapting local eddy viscosity (WALE) model.
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Investigation on conical separation vortex generated by swept shock wave/turbulent boundary layer interaction
TL;DR: In this article , the effects of Mach number, Reynolds number and deflection angle on the conical separation vortex generated by swept shock wave/turbulent boundary layer interaction were analyzed.
References
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Book
An Introduction to Fluid Dynamics
TL;DR: The dynamique des : fluides Reference Record created on 2005-11-18 is updated on 2016-08-08 and shows improvements in the quality of the data over the past decade.
Journal ArticleDOI
On the identification of a vortex
Jinhee Jeong,Fazle Hussain +1 more
TL;DR: In this article, the authors propose a definition of vortex in an incompressible flow in terms of the eigenvalues of the symmetric tensor, which captures the pressure minimum in a plane perpendicular to the vortex axis at high Reynolds numbers, and also accurately defines vortex cores at low Reynolds numbers.
Journal ArticleDOI
Coherent Motions in the Turbulent Boundary Layer
TL;DR: In this paper, the role of coherent structures in the production and dissipation of turbulence in a boundary layer is characterized, summarizing the results of recent investigations, and diagrams and graphs are provided.
Journal ArticleDOI
Mechanisms for generating coherent packets of hairpin vortices in channel flow
TL;DR: In this article, the evolution of a single hairpin vortex-like structure in the mean turbulent field of a low-Reynolds-number channel flow is studied by direct numerical simulation, and the detailed mechanisms for this upstream process are determined, and they are generally similar to the mechanisms proposed by Smith et al. (1991), with some notable differences in the details.
Journal ArticleDOI
A general classification of three-dimensional flow fields
TL;DR: In this paper, the geometry of solution trajectories for three first-order coupled linear differential equations can be related and classified using three matrix invariants for elementary three-dimensional flow patterns defined by instantaneous streamlines for flow at and away from no slip boundaries for both compressible and incompressible flow.