Research on the estimation of near-surface turbulent kinetic energy dissipation rate and temperature variance dissipation rate

Chong Yan; Xiaoqing Wu; Xiaodan Hu

doi:10.1117/12.3019323

30 April 2024 Research on the estimation of near-surface turbulent kinetic energy dissipation rate and temperature variance dissipation rate

Chong Yan, Xiaoqing Wu, Xiaodan Hu

Author Affiliations +

Proceedings Volume 13155, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Imaging Systems; 1315514 (2024) https://doi.org/10.1117/12.3019323
Event: Sixth Conference on Frontiers in Optical Imaging Technology and Applications (FOI2023), 2023, Nanjing, JS, China

Abstract

The three-dimensional wind speed and temperature in Hefei were measured using a three-dimensional ultrasonic anemometer. The turbulence kinetic energy dissipation rate ε and the temperature variance dissipation rate ε_θ were estimated using the radial second-order wind speed structure function and Yaglom's 4/3 law, respectively. The analysis of the correlation between the turbulence kinetic energy dissipation rate ε and stability indicates that ε is at its maximum when the atmosphere is in neutral conditions and decreases as the absolute value of the stability parameter |z/L| increases. C²_T is at its smallest when the atmosphere is in neutral conditions and increases as the absolute value of the stability parameter |z/L| increases. After calculation, the logarithmic correlation coefficient between ε_θ and C²_T is 0.9366.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Chong Yan, Xiaoqing Wu, and Xiaodan Hu "Research on the estimation of near-surface turbulent kinetic energy dissipation rate and temperature variance dissipation rate", Proc. SPIE 13155, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Imaging Systems, 1315514 (30 April 2024); https://doi.org/10.1117/12.3019323

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