WebCoherent definition, logically connected; consistent: a coherent argument. See more. WebOct 10, 2012 · Coherent structures in canonical open-channel flows. Here, we consider flow in straight, wide channels of depth h with smooth walls, unless otherwise stated. The most obvious coherent feature of open-channel flow is the boil phenomena (Yalin Citation 1992, Nezu and Nakagawa Citation 1993).

Proper Orthogonal Decomposition Analysis of Coherent Structure …

WebNov 10, 2024 · To gain insight into the effect of surface roughness on material transport in turbulent Rayleigh–Bénard convection, the Lagrangian coherent structures (LCSs) are extracted using the finite-time Lyapunov exponent method in the cases of different roughness heights. storm gate bowling ball

Coherent structures in turbulent flows - ScienceDirect

WebJan 1, 1988 · Abstract. Coherent structures—loosely defined as regions of concentrated vorticity, characteristic and flow-specific organization, recurrence, appreciable lifetime and scale—have been the foremost object of scientific curiosity and dispute in turbulence research for more than ten years past. The concept, based on visual observations, that ... Turbulent flows are complex multi-scale and chaotic motions that need to be classified into more elementary components, referred to coherent turbulent structures. Such a structure must have temporal coherence, i.e. it must persist in its form for long enough periods that the methods of time-averaged statistics can be applied. Coherent structures are typically studied on very large scales, but can be broken down into more elementary structures with coherent properties of thei… WebNov 28, 2011 · Lagrangian coherent structures have been shown to strongly predict the long-term transport properties of diverse systems ranging from geophysical and atmospheric flows, to biological fluid flows ... stormgate game footage