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pro vyhledávání: '"George, William K."'
Autor:
George, William K., Stanislas, Michel
It is argued herein that when PIV is used to measure turbulence, it can be treated as a time-dependent signal. The `output' velocity consists of three primary contributions: the time-dependent velocity, a noise arising from the quantization (or pixel
Externí odkaz:
http://arxiv.org/abs/2010.10768
Publikováno v:
Journal of Fluid Mechanics 2020
An SPIV experiment using two orthogonal planes simultaneously was performed in the LML boundary layer facility to specifically measure all of the derivative moments needed to estimate the dissipation rate of the Turbulence Kinetic Energy. The Reynold
Externí odkaz:
http://arxiv.org/abs/2010.09364
Autor:
George, William K., Stanislas, Michel, Foucaut, Jean-Marc, Laval, Jean-Philippe, Cuvier, Christophe
An experiment was performed using Dual-plane-SPIV in the LMFL boundary layer facility to determine all of the derivative moments needed to estimate the average dissipation rate of the turbulent kinetic energy, $\varepsilon$, and its Reynolds stress c
Externí odkaz:
http://arxiv.org/abs/2010.09348
Autor:
Stanislas, Michel, Foucaut, Jean Marc, George, William K., Cuvier, Christophe, Laval, Jean Philippe
An experiment was performed using SPIV in the LMFL boundary layer facility to determine all the derivative moments needed to estimate the average dissipation rate of the turbulence kinetic energy, $\varepsilon = 2 \nu \langle s_{ij}s_{ij} \rangle$ wh
Externí odkaz:
http://arxiv.org/abs/2010.09347
In the current work the reconstruction of the far-field region of the turbulent axi-symmetric jet is performed in order to investigate the modal turbulence kinetic energy production contributions. The reconstruction of the field statistics is based o
Externí odkaz:
http://arxiv.org/abs/1909.01307
The current work presents a tensor formulation of the Lumley Decomposition (LD), introduced in its original form by Lumley (1967b), allowing decompositions of turbulent flow fields in curvilinear coordinates. The LD in his form is shown to enable sem
Externí odkaz:
http://arxiv.org/abs/1908.05134
Publikováno v:
Experiments in Fluids, vol: 55, issue: 11, 2014
We present velocity power spectra computed by the so-called direct method from burst type laser Doppler anemometer (LDA) data, both measured in a turbulent round jet and generated in a computer. Using today's powerful computers we have been able to s
Externí odkaz:
http://arxiv.org/abs/1906.05337
Publikováno v:
Experiments in Fluids, vol: 55, issue: 2, 2014
We investigate power spectra of a randomly sampled stationary stochastic signal, e.g. a spatial component of a turbulent velocity. We extend the methods of previous authors that basically assumed point or delta function sampling by including features
Externí odkaz:
http://arxiv.org/abs/1906.05339
Publikováno v:
Experiments in Fluids, vol: 55, issue: 3, 2014
The estimation of power spectra from LDA data provides signal processing challenges for fluid dynamicists for several reasons: acquisition is dictated by randomly arriving particles, the registered particle velocities tend to be biased towards higher
Externí odkaz:
http://arxiv.org/abs/1906.05335
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