Turbulence denoising based on proper orthogonal decomposition

Lu Yao; Liu Huan; Wu Jiaxue

doi:10.12284/hyxb2022089

Volume 44 Issue 9

Aug. 2022

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Lu Yao，Liu Huan，Wu Jiaxue. Turbulence denoising based on proper orthogonal decomposition[J]. Haiyang Xuebao，2022, 44(9)：132–144 doi: 10.12284/hyxb2022089

Citation:

Lu Yao，Liu Huan，Wu Jiaxue. Turbulence denoising based on proper orthogonal decomposition[J]. Haiyang Xuebao，2022, 44(9)：132–144 doi: 10.12284/hyxb2022089

Citation:

Lu Yao，Liu Huan，Wu Jiaxue. Turbulence denoising based on proper orthogonal decomposition[J]. Haiyang Xuebao，2022, 44(9)：132–144 doi: 10.12284/hyxb2022089

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Turbulence denoising based on proper orthogonal decomposition

doi: 10.12284/hyxb2022089

Lu Yao^1
,,
Liu Huan^{1, 2
,
,},
Wu Jiaxue^{1, 2}

1.
School of Marine Science, Sun Yat-sen University, Zhuhai 519082, China
2.
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519080, China

Received Date: 2021-09-09
Rev Recd Date: 2021-12-28

Available Online: 2022-03-25

Publish Date: 2022-08-29

Abstract

Abstract

In the studies of turbulence in coastal and estuary, the turbulence data from field observation is often influenced by noise, which leads to deviate the estimation of turbulence properties. Proper orthogonal decomposition is a method which decompose and reconstruct the flow structure in energy filed. Based on this method, the turbulence data containing noise is denoised combined with numerical experiments and field observation data. The results show that: (1) Proper orthogonal decomposition can remove the noise in turbulence effectively. The percentage of retained energy in reconstruction should be consistent with the percentage of turbulence energy in the raw signal. The results of denoising are related to the percentage of noise, the higher the percentage of noise, the effect of denoising is more obvious. (2) In the field observation, the percentage of noise in the slack tide is obviously higher than the noise which in the non-slack tide, while the percentage of noise in the horizontal direction is higher than that in the vertical direction. The estimation of each turbulence properties is more reasonable after using the proper orthogonal decomposition to denoise.
- proper orthogonal decomposition,
- turbulence,
- denoising,
- energy spectrum,
- turbulence properties

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References(33)

References

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