The Interaction Between The Different Scale Eddies of The Turbulence湍流不同尺度旋涡相互作用The turbulence is composed from a large number of eddies of different scales.In the inertial range,the "2/3 power-law"for velocity structure function and the "-5/3 power-law" for energy spectrum were ...
Large turbulence production in the viscous wall region is found to occur in updrafts and downdrafts associated with closed eddies. These eddies, on average, have a spanwise dimension of 50 wall units and a streamwise dimension of 400-450 wall units. They are often seen to originate from ...
Turbulence a phenomenon that is observed in many flows of liquids and gases and consists in the formation of numerous eddies of different sizes in these flows. As a result of eddy formation, hydrodynamic and thermodynamic characteristics of the flows, such as velocity, temperature, pressure, and ...
Point‐vortex simulation of the inverse energy cascade in two‐dimensional turbulence The conventional cloud‐in‐cell vortex representation of the two‐dimensional Euler equations is modified to allow energy injection from small scales. A s... Siggia,D Eric - 《Physics of Fluids》 被引量: 83发表...
Mathematically, one may think of separating the velocity field into a resolved and sub-grid part. The resolved part of the field represent the "large" eddies, while the subgrid part of the velocity represent the "small scales" whose effect on the resolved field is included through the subgri...
Scaling of Wall-Normal Turbulence Intensity and Vertical Eddy Structures in the Atmospheric Surface Layer Article30 October 2017 1Introduction Turbulent motion of a fluid occurs over a broad range of scales. The smallest scales are usually defined as the scale at which the motion dissipates into he...
(about 5 mm)56, allows the insect to avoid turbulence from breaking waves. The energy density in the ocean dissipates rapidly towards scales approaching the Kolmogorov length such that the maximum size of turbulent eddies is of the order of 5 cm and contains only 1% of the maximum ...
The generation of lee waves in the Gulf Stream along the U.S. seaboard is investigated using high resolution realistic simulations. The model reproduces the surface signature of the waves, which compares favourably with observations from satellite sun gl
16b, e and h where close to the non-conformal interfaces, the results show a sudden decrease. In this case, the sudden decrease is dependent on the difference between the resolved turbulence obtained on the fine (subdomain Ωnc,2) and coarse resolution (subdomain Ωnc,3) of the fine-...
Experimental measurement study on the structure of the Reynolds stress and turbulence spectrum for wind flows over a two-dimensional escarpment with mild upwind slope (slope angle θ = 15°) were performed in the wind tunnel. The Quadrant analysis was applied to analyze the experimental data and ...