Influence of a Surface Fractal Microstructure on the Characteristics of a Turbulent Boundary Layer

Brutyan, M. A.; Budaev, Vyacheslav; Wolkov, A. V.; Zhitlukhin, A.M.; Karpov, A. V.; Klimov, Nikolay Sergeevich; Men’shov, Igor; Podkovyrov, V. L.; Urusov, Andrey Yuryevich; Успенский, А. А.; Ustinov, M. V.

doi:10.1615/tsagiscij.2013010513

Cited by 4 publications

(10 citation statements)

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“…The normal diffusion law (as classic diffusion implies that α = 1) is observed in quiet SW, in MSH out of the Earth's magnetosphere TBL and sheared flows in the vicinity of X-points with destroyed magnetic structure in fusion devices, Budaev et al (2011). Superdiffusive transport with scaling exponent α close to 2 is discussed in Savin et al (2014) Brutyan et al 2013). These results support a view that the intermittent transport in TBLs display the universality predicted by the log-Poisson model.…”

Section: Scalings Of Intermittent Plasma Transportsupporting

confidence: 68%

“…Fourier spectra of the velocity pulsations in TBLs are broadband and statistics are non-Gaussian. Below, we demonstrate the intermittency property observed in the low-turbulent aerodynamic T-36I wind tunnel at TsAGI (Russia) by Brutyan et al (2013). The test section of 2600 mm had a rectangular cross section of 500 mm × 350 mm of the velocity of 8-55 m s −1 .…”

Section: Comparison With Hydrodynamic Turbulencementioning

confidence: 66%

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Generalized self-similarity of intermittent plasma turbulence in space and laboratory plasmas

2015

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Statistical characteristics of plasma fluctuations in the solar wind (SW), the Earth's magnetosphere and fusion devices are reviewed. The turbulence in all these media has a complicated multiscale structure and exhibits a generalized self-similarity in an extended scale range. The anomalous transport of mass and momentum is intermittent and is carried by sporadic plasma flux bursts with non-Gaussian statistics, long-range correlation and multifractality. Intermittent turbulent transport is characterized by superdiffusion with power law δx 2 ∝ τ α , α ≈ 1.2-1.8. The structure functions in all these plasma environments are well fitted by the log-Poisson model of turbulence. Intermittent plasma turbulence displays universal properties and consists of quasi-1-D singular dissipative structures.

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Section: Scalings Of Intermittent Plasma Transportsupporting

confidence: 68%

Section: Comparison With Hydrodynamic Turbulencementioning

confidence: 66%

Generalized self-similarity of intermittent plasma turbulence in space and laboratory plasmas

2015

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“…During tests at wide range of Re number there were observed a reduction of drag coefficient C x for the model with fractal surface comparing to the corresponding value of C x of abrasive surface with the same mean roughness (Fig. 6) [10].…”

Section: Possible Ways Of Drag Reductionmentioning

confidence: 64%

Modern problems of aircraft aerodynamics

2019

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The article represents the discussion of several separate directions of investigations, which are performed by TsAGI flight vehicles aerodynamics specialists at the time. There are some major trends of classical layout of route aircraft and also peculiarities of some prospective flight vehicles. Also there are some hypersonic vehicles aerodynamics questions examined along with problems of creation of civil supersonic transport aircraft. There is a description given for well-known and some newer methods of flow control for drag reduction.

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Section: Viscous Flow Resistancementioning

confidence: 99%

“…If nondimensionalized and written in relative units, the formula (31) would be presented in the following form: [12], it was searched the hydrodynamic flow past rough surfaces for various Reynolds numbers. As it is shown by our theoretical analysis, the qualitative behavior in [12] is in conformity with the results reflected in this article. But, for example, in the paper [7], the effects of hydrodynamic flow past an extended smooth cylindrical object were considered for which the resistance force acting along the surface of the rod was calculated, which was not previously done, but what has been continued in this paper.…”

Section: Viscous Flow Resistancementioning

confidence: 99%

On physical applications of one- and two-dimensional topological objects with fractal dimension

2018

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In this paper, the heat transfer coefficient of a body with a fractal surface having the fractal dimension connecting with the fractal dimension of some body, as well as the resistance to a current of fluids flowing normal to such body is shown. It is noted that with an end flow of such flat bodies, by virtue of their fractal perimeter the side resistive force will have the fractal dimension and contribute significantly to the total resistive force acting on any similar structure. It was calculated the dependence of the resistance force of the Reynolds number and was given its graphic illustration. It is noted that the result can be used in medicine in the diagnosis of eye diseases, as well as in marine applications.

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Influence of a Surface Fractal Microstructure on the Characteristics of a Turbulent Boundary Layer

Cited by 4 publications

References 0 publications

Generalized self-similarity of intermittent plasma turbulence in space and laboratory plasmas

Generalized self-similarity of intermittent plasma turbulence in space and laboratory plasmas

Modern problems of aircraft aerodynamics

On physical applications of one- and two-dimensional topological objects with fractal dimension

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