Results 41 to 50 of about 1,092 (161)
Optics Communications, 2021 Abstract Adaptive optics compensation effect on the performance of an optical wireless communication system (OWC) employing M-ary pulse position modulation (PPM) scheme in anisotropic non-Kolmogorov turbulent atmosphere is investigated. Avalanche photodetector (APD) is used at the receiver side and log-normal channel that models the weak turbulence ...
Yalçın Ata +2 more
openaire +2 more sources
Water Environment Research, Volume 98, Issue 5, May 2026.CFD integrated with AI provides a next‐generation framework for optimizing aeration systems in wastewater treatment plants, improving oxygen transfer, addressing scale‐up limitations, and enabling energy‐efficient, low‐carbon operation. ABSTRACT Wastewater treatment plants (WWTPs) are facing dual pressures of increasing influent variability and the ...
Egemen Aras, Damla Yilmaz Çelik
wiley +1 more source
Smagorinsky constant in LES modeling of anisotropic MHD turbulence
, 2008 Turbulent fluctuations in magnetohydrodynamic (MHD) flows can become strongly anisotropic or even quasi-2D under the action of an applied magnetic field. We investigate this phenomenon in the case of low magnetic Reynolds numbers.
Vorobev, Anatoliy, Zikanov, Oleg
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PlumeDEBuG: Data‐Informed Modeling for Synthetic Bubble Plume Image Generation
Water Resources Research, Volume 62, Issue 5, May 2026.Abstract Bubble plumes play an important role in both natural and engineered aquatic systems. Optical imaging has been widely used to study bubble size distributions, meandering, and plume growth. Machine learning (ML) offers new opportunities in analyzing optical images of bubble plumes.
Xuchen Ying, Binbin Wang
wiley +1 more source
Kinetic helicity and MHD turbulence
, 2000 The issue of dynamical anisotropy in helical three-dimensional magnetohydrodynamic turbulence with a mean magnetic field B₀ is investigated. Using high-resolution direct numerical simulations, we follow the evolution of various isotropic initial states ...
Oughton, Sean, Prandi, Rossella
core +1 more source
Solar cycle dependence of scaling in solar wind fluctuations [PDF]
, 2008 In this review we collate recent results for the statistical scaling properties of fluctuations in the solar wind with a view to synthesizing two descriptions: that of evolving MHD turbulence and that of a scaling signature of coronal origin that ...
B. Hnat +6 more
core +1 more source
Oceanic non-Kolmogorov optical turbulence and spherical wave propagation
, 2020 Optics Express, 2021, 29(2): 1340-1359 Light propagation in turbulent media is conventionally studied with the help of the spatio-temporal power spectra of the refractive index fluctuations.
Zhang, Yu +6 more
core +2 more sources
Quadratic Vortex Optical Pin Beam With OAM Mode Anti-Degradation Characteristic
IEEE Photonics JournalOrbital angular momentum (OAM) signal mode crosstalk and energy loss induced by atmospheric turbulence are challenging phenomena commonly occurring in high-capacity and high-speed OAM-based free-space optical communications. In this paper, we combine the
Huahua Wang +8 more
doaj +1 more source
Fine dissipative properties of Euler solutions with measure first derivatives
Bulletin of the London Mathematical Society, Volume 58, Issue 5, May 2026.Abstract We study fine properties of bounded weak solutions to the incompressible Euler equations whose first derivatives, or only some combinations of them, are Radon measures. As consequences we obtain elementary proofs of the local energy conservation for solutions with bounded variation or deformation, without relying on the freedom in choosing the
Marco Inversi
wiley +1 more source
Natural Sciences, Volume 6, Issue 2, April 2026.v. Weizsäcker and Heisenberg began their turbulence collaboration in 1945 while still quarantined at Farm Hall. Their papers were submitted separately in 1946 from Göttingen. v. Weizsäcker had derived the 5/3 law for dissipation while using dimensional analysis in real space.
Joseph L. McCauley
wiley +1 more source