Turbulence in fluid layers
نویسندگان
چکیده
منابع مشابه
Turbulence structure in thick layers of fluid
Measurements of spatial structure of turbulence in thick fluid layers driven electromagnetically at small scales are reported. It is shown that at modest Reynolds numbers the top sublayer behaves as quasi-2D and supports the inverse energy cascade regardless of the layer depth. The cascade survives even in the presence of strong 3D eddies developing in a layer whose depth exceeds half the forci...
متن کاملTurbulence in Thick Layers
Properties of turbulence, such as the direction of the energy cascade depend on the flow dimensionality. Recent experimental results reveal new physics understanding of flows in thick layers. We show that the flow dimensionality can be characterized by the flow damping and that a comparison of the decay rate with that of a quasi-2D flow can be used as a measure of dimensionality of a turbulent ...
متن کاملFluid turbulence
The swirling motion of fluids that occurs irregularly in space and time is called turbulence. However, this randomness, apparent from a casual observation, is not without some order. Turbulent flows are as abundant in nature as life itself, and are pervasive in technology. They are a paradigm for spatially extended nonlinear dissipative systems in which many length scales are excited simultaneo...
متن کاملRobust inverse energy cascade and turbulence structure in three-dimensional layers of fluid
Here, we report the first evidence of the inverse energy cascade in a flow dominated by 3D motions. Experiments are performed in thick fluid layers where turbulence is driven electromagnetically. It is shown that if the free surface of the layer is not perturbed, the top part of the layer behaves as quasi-2D and supports the inverse energy cascade regardless of the layer thickness. Well below t...
متن کاملSpectrally condensed turbulence in thin layers
We present experimental results on the properties of bounded turbulence in thin fluid layers. In contrast with the theory of two-dimensional 2D turbulence, the effects of the bottom friction and of the spectral condensation of the turbulence energy are important in our experiment. Here we investigate how these two factors affect statistical moments of turbulent fluctuations. The inverse energy ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2011
ISSN: 1742-6596
DOI: 10.1088/1742-6596/318/1/012001