[PDF] Top 20 Large eddy simulation of turbulent flow over a rough surface

... a rough surface, while a metal shark-tooth fence is mounted at the ...the surface in this working section to be fully aerodynamically ...ABL simulation was very carefully checked, with the ... See full document

... numerical simulation (DNS), with the advantages of resolving all scales of fluid mo- tions, has also been adopted for the study of several model ...direct simulation of turbulent boundary-layer flow ... See full document

... Abstract. Wavelet analysis is applied to data from PIV measurement in order to recognize a specific structure in the flow. The PIV snaphots achieved on the model of the street canyon was used as a test case. Four ... See full document

... contained flow structures similar (but not identical) to those of the ensemble-average, with almost equal mass-specific kinetic ...non-stationary flow simulation in a well-defined and simple ... See full document

... transient turbulent flow with temporal pressure gradient are relatively ...numerical simulation (DNS) of a decelerated turbulent channel flow subjected to a sudden change of pressure ... See full document

... Techniques such as hot-wire anemometry, particle image velocimetry, floating ele- ment balances, Preston-tube methods and oil-film interferometry have been devel- oped to enable observations and analysis of specific ... See full document

... dynamic flow scenario where the flow travels over repeated transitions between smooth and rough surface conditions, hence taking advantage of the fact that the wall model operates ... See full document

... pipe flow was heavily dependent on what later became known as the Reynolds number, a ratio of inertial (ρu 2 ) to viscous forces (µ L u ) per unit ...the flow to more easily remain smooth and coherent, this ... See full document

... The turbulent flow of a fluid over a rough surface is relatively less well understood than that over smooth ...example, flow in natural rivers and flow over ... See full document

... this flow in the context of turbulent ...of large spanwise organized structures in incompressible, high-Reynolds-number shear ...the flow from laminar to unsteady, due to the formation of the ... See full document

... are turbulent and the channel beds are often composed of large-scale, potentially mobile, rough elements such as sand and gravel particles, the study of turbulent open channel flows ... See full document

... Large eddy simulation (LES) is known as a most promising technical ap- proach to simulate atmospheric flow and dispersion, because of the very large Reynolds number ...flows over ... See full document

... numerical simulation of the TBL including high-order nonspectral methods and boundary conditions suitable for spatially developing flows with only one, as opposed to two, homogeneous ...of turbulent ... See full document

... the flow around the particles create largely different hydrodynamic forces which fluctuate in direction and ...consequence flow patterns evolve which show micro-vortices resembling those that occur in ... See full document

... 649 The interdune spacing significantly alters the turbulent flow over the stoss side of the 650 downstream dunes; coherent high- and low-speed streaks are shorter but stronger, and the [r] ... See full document

... of turbulent flow in and above cubical roughness, and revealed that turbulent organized structures are much larger than surface obstacles (Kanda et ...such turbulent structures ... See full document

... Implicit Large Eddy Simulation of weakly-compressible turbulent channel ...profiles, turbulent shear stresses and higher- order turbulent statistics reveal that the low Mach ... See full document

... of flow discharge in a river, especially during floods. The flow over a dune itself affects the bed deformation, sedimentation 45 events, and has interactions with the free ...of flow helps to ... See full document

... internal flow of a Diesel injector during an entire pilot injection ...nozzle flow during this short event is highly dynamic and vapor cavities may appear at the end of the ...the flow ... See full document

... layer flow transition to turbulence in the region c lose to the trailing edge has been investigated, where narro wband peaks and tones associated with vorte x shedding superimposed onto the broadband noise induced ... See full document