Friction velocity estimation from the Reynold stress tensor
Friction velocity calculation with Klipp's method (2018)
The friction velocity is computed using a Matlab implementation of the method proposed by Klipp [1]. This method has the advantage to avoid the correction of instrument tilt by using the Reynolds stress tensor invariants. In [1], the friction velocity calculated for neutral conditions is found to be in good agreement with the standard method. Larger discrepancies are expected for non-neutral conditions or low wind speeds but produce a dimensionless shear that scales well with the non-dimensional Obukhov length. Type of application: Micrometeorology, surface layer turbulence.
Content
The present Matlab submission contains:
- A function "frictionVelocity.m", which computes the friction velocity using the standard method or the one proposed in [1]. The latter method is more appropriate in complex terrain and a neutral atmosphere.
- An example file "Example1.mlx" that compares the 2 methods
- A data file "data.mat" that contains simulated wind turbulent velocity records
Reference
[1] Klipp, C. (2018). Turbulent friction velocity calculated from the Reynolds stress tensor. Journal of the Atmospheric Sciences, (2018).
引用
E. Cheynet (2024). Friction velocity estimation from the Reynold stress tensor (https://github.com/ECheynet/Klipp2018/releases/tag/v1.4), GitHub. 取得済み .
E. Cheynet. ECheynet/Klipp2018 v1.4. Zenodo, 2020, doi:10.5281/ZENODO.3782792.
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Start Hunting!バージョン | 公開済み | リリース ノート | |
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1.4 | See release notes for this release on GitHub: https://github.com/ECheynet/Klipp2018/releases/tag/v1.4 |
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1.3 | See release notes for this release on GitHub: https://github.com/ECheynet/Klipp2018/releases/tag/v1.3 |
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1.2 | New Example file created + modification of the main function |
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1.1 | Added the project website |
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1.0.0.0 | typo
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