Propagation of Laguerre-Gaussian and Im-Bessel beams through atmospheric turbulence: A computational study

2020 ◽  
Author(s):  
Nathaniel A. Ferlic ◽  
Miranda van Iersel ◽  
Daniel A. Paulson ◽  
Christopher C. Davis
Keyword(s):  
Atmospheric Turbulence ◽  
Computational Study ◽  
Bessel Beams

Spiral Phase Spectrum of Focused Bessel Beams in Atmospheric Turbulence Channel

2020 ◽  
Vol 40 (24) ◽  
pp. 2401001
Author(s):  
韦宏艳 Wei Hongyan ◽  
闫玠霖 Yan Jielin ◽  
贾鹏 Jia Peng ◽  
蔡冬梅 Cai Dongmei
Keyword(s):  
Atmospheric Turbulence ◽  
Phase Spectrum ◽  
Bessel Beams ◽  
Spiral Phase

scholarly journals Probability density of the orbital angular momentum mode of Hankel-Bessel beams in an atmospheric turbulence

2014 ◽  
Vol 22 (7) ◽  
pp. 7765 ◽  
Author(s):  
Yu Zhu ◽  
Xiaojun Liu ◽  
Jie Gao ◽  
Yixin Zhang ◽  
Fengsheng Zhao
Keyword(s):  
Angular Momentum ◽  
Probability Density ◽  
Atmospheric Turbulence ◽  
Orbital Angular Momentum ◽  
Bessel Beams ◽  
Momentum Mode

Prediction of Atmospheric Turbulence Characteristics for Surface Boundary Layer using Empirical Spectral Methods

2020 ◽  
Author(s):  
Yagya Dutta Dwivedi ◽  
Vasishta Bhargava Nukala ◽  
Satya Prasad Maddula ◽  
Kiran Nair
Keyword(s):  
Boundary Layer ◽  
Time Series ◽  
Surface Roughness ◽  
Wind Speed ◽  
Atmospheric Turbulence ◽  
Surface Boundary ◽  
Low Frequencies ◽  
Surface Boundary Layer ◽  
Power Spectral ◽  
Mean Wind Speed

Abstract Atmospheric turbulence is an unsteady phenomenon found in nature and plays significance role in predicting natural events and life prediction of structures. In this work, turbulence in surface boundary layer has been studied through empirical methods. Computer simulation of Von Karman, Kaimal methods were evaluated for different surface roughness and for low (1%), medium (10%) and high (50%) turbulence intensities. Instantaneous values of one minute time series for longitudinal turbulent wind at mean wind speed of 12 m/s using both spectra showed strong correlation in validation trends. Influence of integral length scales on turbulence kinetic energy production at different heights is illustrated. Time series for mean wind speed of 12 m/s with surface roughness value of 0.05 m have shown that variance for longitudinal, lateral and vertical velocity components were different and found to be anisotropic. Wind speed power spectral density from Davenport and Simiu profiles have also been calculated at surface roughness of 0.05 m and compared with k−1 and k−3 slopes for Kolmogorov k−5/3 law in inertial sub-range and k−7 in viscous dissipation range. At high frequencies, logarithmic slope of Kolmogorov −5/3rd law agreed well with Davenport, Harris, Simiu and Solari spectra than at low frequencies.

Sign in / Sign up

Export Citation Format

Share Document