[PDF] Top 20 Turbulent Structure in Open Channel Flow

... uniform open channel flow data reported by Roussinova et ...the channel aspect ratio on different smooth open channel flow (OCF) velocity profiles and showed that all ... See full document

... The structure of the turbulence in shallow flows is three-dimensional, produced by the ejection and sweep events of the shear layer near the smooth ...the flow providing for a very different mechanism of ... See full document

... control turbulent flows and to design hydraulic structures ...of channel transitions, it is necessary to avoid excessive energy loss, to eliminate cross waves and the turbulence, to ensure smooth ... See full document

... Present study examines turbulent structures of a rough bed open-channel flow in the context of deterministic approach. Instantaneous velocity field is measured in different hydraulic ... See full document

... In addition, the following operations were performed on the LIF scanned surfaces. Firstly, the linear trend in the LIF data resulting from the channel slope was removed. Secondly, a possible offset in water height ... See full document

... The flows subjected to sudden perturbation are encountered frequently in practice. For example, when offshore breezes encounter a coastline, the sudden change in surface roughness can have significant effect on the ... See full document

... in open channel ...the flow in open channel is effected by the wall roughness of the channel, the cross sectional area as well as the roughness and viscosity of the bed ... See full document

... of turbulent channel flow, it was found that these controllers significantly reduced the mean perturbation en- ergy of the modes they ...the flow they could prevent energy production in all ... See full document

... simulating turbulent flows with rough walls is not only in resolving fine turbulent structures, but also adequately representing individual obstacles which collectively make up the rough ...wall flow ... See full document

... mean flow and turbulence characteristics of open channel T-diversion ...main channel, as well as the downstream region of a branch ...the channel diversion region, where ... See full document

... instantaneous flow fields are necessary for gaining a clear statistical description of turbulent ...from turbulent shear flows [16] ...compressible turbulent channel flows, the ... See full document

... E.13 Velocity and turbulent intensity vertical profile data for S90 E.14 Steady flow snapshot data... Wetted cross-sectional area.[r] ... See full document

... overall drag estimate. For example, aircraft manufacturers would prefer to perform simulations using a smaller value of κ, since the fuel consumption would appear to be more economical than a competitor's estimate with ... See full document

... of turbulent motion resolved, whereas the sub-grid turbulent scales and their effect on the mean flow are ...scale turbulent structures interact with bubbles and are responsible for the ... See full document

... In the framework of classical LES, the accuracy of the SGS model is strongly influenced by the numerical con- tamination of the smallest resolved turbulent structures near the filter cut-o ff length [51, 52, 59]. ... See full document

... This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium,[r] ... See full document

... in open channel flow profile effects of the construction of a cylindrical shaped hydraulic control ...structure. Flow rate in both cases was fixed, the comparison between the two cases ... See full document

... rectangular channel considered was of dimensions 2h × 2 h × 4 h , which in terms of wall units becomes = 3547, = 1774 and = ...the channel in the streamwise direction was sufficiently long to capture the ... See full document

... dimensional open-channel flow around a vertical circular cylinder ...the turbulent model has been applied a standard κ-ε two equations model and the two-dimensional Reynolds Averaged ... See full document

... different flow depths are fitted to the semi-analytical results for the rough bed turbulent flows (Cheng, 2007) in ...bed turbulent flow velocity profiles can be reflected by the index m in ... See full document