Coherent structures in turbulent atmosphere

Nosov, V. V.; Grigoriev, V. M.; Kovadlo, P. G.; Лукин, В. П.; Nosov, E. V.; Torgaev, A. V.

doi:10.1117/12.823804

Cited by 13 publications

(28 citation statements)

References 2 publications

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“…This optical result can be explained now by the dominant action of one coherent structure during the measurements in [2,3,18]. The experimental data confirm the theoretical results and point to a significant decrease in optical fluctuations.…”

Section: Experimental Observations Of Coherent Turbulence Manifestationsupporting

confidence: 85%

“…As was experimentally ascertained earlier [2,19], the variance of jitter of astronomical images (lunar limb, Fig. 2) is independent of at for receivers of large size, in contrast to the ordinary dependence for a Kolmogorov spectrum (the dashed curve in Fig.…”

Section: Experimental Observations Of Coherent Turbulence Manifestationmentioning

confidence: 89%

“…It turns out that real atmospheric turbulence is a (incoherent) mixture of different coherent structures with incommensurable frequencies of primary energy carrying vortices. Therefore, a coherent structure can be considered as a structural element forming Kolmogorov turbulence [2,3,[18][19][20][21].…”

Section: Discussionmentioning

confidence: 99%

“…In a real atmosphere, this can occur in, for example, the surface layer when the underlying surface is strongly irregular. Similar situations can occur in mountain conditions [2,3,15,16]. In our opinion, the behavior of primary energy-carrying scales, i.e., outer turbulence scales, is a key element of the formation of a spectrum model [9][10][11][12][13].…”

Section: Generation Of Kolmogorov Turbulencementioning

confidence: 98%

“…The measurement results show that the integrated intensity is almost twice less by the presence in atmosphere the large coherent structures (coherent turbulence) near the telescope than in the case of incoherent Kolmogorov turbulence (the large-scale coherent structures are absent). On the high-mountain optical solar telescope the experiment to the measure of the image jitter of the solar disk edge was made (Sayan Solar Observatory of the Institute of Solar-Terrestrial Physics SB RAS) [1][2][3]. The measurement results show that the effect of the considerable decrease of the image jitters is observed by the presence in the atmosphere near the telescope the large coherent structures (coherent turbulence).…”

Section: Introductionmentioning

confidence: 96%

See 4 more Smart Citations

Comparison of singular-optical and statistical approaches for investigations of turbulence tasks

Лукин

Angelski

Bolbasova

et al. 2013

Eleventh International Conference on Correlation Optics

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Experimental data of our turbulence measurements (by ultrasonic digital sensors) in the various areas and meteosituations show that large areas are often observed in open atmosphere, in which one large coherent structure has the main influence. Turbulence in such areas is called as coherent. Incoherent Kolmogorov turbulence is detecting, as a rule, on sites with a flat surface. Coherent turbulence differs from Kolmogorov turbulence by the faster decrease of a time spectrum in an inertial interval (f -8/ 3 instead of f -5/ 3 ) and the smaller contribution of the high-frequency components.

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Section: Experimental Observations Of Coherent Turbulence Manifestationsupporting

confidence: 85%

Section: Experimental Observations Of Coherent Turbulence Manifestationmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Generation Of Kolmogorov Turbulencementioning

confidence: 98%

Section: Introductionmentioning

confidence: 96%

See 3 more Smart Citations

Comparison of singular-optical and statistical approaches for investigations of turbulence tasks

Лукин

Angelski

Bolbasova

et al. 2013

Eleventh International Conference on Correlation Optics

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Features of optical image jitter in a random medium with a finite outer scale

Bolbasova

Kovadlo

Лукин

et al. 2013

2013 International Conference on Advanced Optoelectronics and Lasers (CAOL 2013)

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Atmospheric coherent turbulence

et al. 2012

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This paper summarizes results received by authors for last decade on the problem of the atmospheric coherence turbulence. Also shows some new results of the unpublished researches. According to our data the coherent turbulence is the result of the self-organizing non-linear processes in continuous media, including in the atmospheric air. New theoretical and experimental data are considered, it confirm the effect of the decreasing of the optical waves fluctuations in the coherence turbulence. Key words: the coherence turbulence, optical wave fluctuations Absract A.S. Monin and A.M. Yaglom [1] define coherent structure as nonrandom nonlinear steady superposition of large-scale turbulence components. However, as it is established in [2-6], the process of the disintegration of a hydrodynamic cell proceeds to the smallest vortexes, which else can exist in air. Therefore in [2-6] the concept «coherent structure» is expanded. The hydrodynamic coherent structure is called the compact formation containing into itself the long-living spatial vortical structure (appearing as a result of the long action of thermodynamic gradients) and products of its discrete coherent cascade disintegration. In the expanded understanding, the coherent structure is the solitonic solution of the hydrodynamic equations (solitary wave), and contains both large-scale, and small-scale turbulence.

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Coherent structures in turbulent atmosphere

Cited by 13 publications

References 2 publications

Comparison of singular-optical and statistical approaches for investigations of turbulence tasks

Comparison of singular-optical and statistical approaches for investigations of turbulence tasks

Features of optical image jitter in a random medium with a finite outer scale

Atmospheric coherent turbulence

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