Third generation of vortex identification methods: Omega and Liutex/Rortex based systems
A vortex is intuitively recognized as the rotational/swirling motion of fluids, but a rigorous and
universally-accepted definition is still not available. Vorticity tube/filament has been …
universally-accepted definition is still not available. Vorticity tube/filament has been …
Attached eddy model of wall turbulence
Modeling wall turbulence remains a major challenge, as a sufficient physical understanding
of these flows is still lacking. In an effort to move toward a physics-based model, AA …
of these flows is still lacking. In an effort to move toward a physics-based model, AA …
[HTML][HTML] Rortex—A new vortex vector definition and vorticity tensor and vector decompositions
C Liu, Y Gao, S Tian, X Dong - Physics of Fluids, 2018 - pubs.aip.org
A vortex is intuitively recognized as the rotational/swirling motion of the fluids. However, an
unambiguous and universally accepted definition for vortex is yet to be achieved in the field …
unambiguous and universally accepted definition for vortex is yet to be achieved in the field …
New omega vortex identification method
A new vortex identification criterion called Ω-method is proposed based on the ideas that
vorticity overtakes deformation in vortex. The comparison with other vortex identification …
vorticity overtakes deformation in vortex. The comparison with other vortex identification …
[HTML][HTML] Rortex and comparison with eigenvalue-based vortex identification criteria
Y Gao, C Liu - Physics of Fluids, 2018 - pubs.aip.org
Most of the current Eulerian vortex identification criteria, including the Q criterion and the λ ci
criterion, are exclusively determined by the eigenvalues of the velocity gradient tensor or the …
criterion, are exclusively determined by the eigenvalues of the velocity gradient tensor or the …
Coherent structures in wall-bounded turbulence
J Jiménez - Journal of Fluid Mechanics, 2018 - cambridge.org
This article discusses the description of wall-bounded turbulence as a deterministic high-
dimensional dynamical system of interacting coherent structures, defined as eddies with …
dimensional dynamical system of interacting coherent structures, defined as eddies with …
A review of methods for vortex identification in hydroturbines
Vortex is one of typical structures of the unsteady flow inside the hydroturbines, leading to
significant pressure fluctuation, prominent vibration of the units, and fatigue of turbine …
significant pressure fluctuation, prominent vibration of the units, and fatigue of turbine …
High–Reynolds number wall turbulence
We review wall-bounded turbulent flows, particularly high–Reynolds number, zero–pressure
gradient boundary layers, and fully developed pipe and channel flows. It is apparent that the …
gradient boundary layers, and fully developed pipe and channel flows. It is apparent that the …
特约论文: 水轮机技术进展与发展趋势
罗兴锜, 朱国俊, 冯建军 - 水力发电学报, 2020 - slfdxb.cn
水轮机作为水电能源开发的核心机械装备, 其性能的优劣决定了水电能源的开发利用率.
在现代科技进步的推动下, 水轮机技术也取得了长足发展. 我国水轮机技术的发展经历了引进 …
在现代科技进步的推动下, 水轮机技术也取得了长足发展. 我国水轮机技术的发展经历了引进 …
[HTML][HTML] Wall-bounded turbulent flows at high Reynolds numbers: recent advances and key issues
Wall-bounded turbulent flows at high Reynolds numbers have become an increasingly
active area of research in recent years. Many challenges remain in theory, scaling, physical …
active area of research in recent years. Many challenges remain in theory, scaling, physical …