TEMPORO-SPECTRAL COHERENT STRUCTURE OF TURBULENCE AND PRESSURE USING FOURIER AND WAVELET TRANSFORMS
Studying the spatial distribution in coherent fields such as turbulent and turbulent-induced force ones is important to model and evaluate turbulent-induced forces and response of structures on the turbulent flows. Turbulent field-based coherent function is commonly used for the spatial distribution...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Universiti Brunei Darussalam
2017-11-01
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| Series: | ASEAN Journal on Science and Technology for Development |
| Online Access: | http://www.ajstd.org/index.php/ajstd/article/view/271 |
| _version_ | 1797330298173652992 |
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| author | Thai-Hoa Le Dong-Anh Nguyen |
| author_facet | Thai-Hoa Le Dong-Anh Nguyen |
| author_sort | Thai-Hoa Le |
| collection | DOAJ |
| description | Studying the spatial distribution in coherent fields such as turbulent and turbulent-induced force ones is important to model and evaluate turbulent-induced forces and response of structures on the turbulent flows. Turbulent field-based coherent function is commonly used for the spatial distribution characteristic of induced forces in the frequency domain. This paper will focus to study spectral coherent structure of turbulence and forces in not only the frequency domain using conventional Fourier transform-based coherence, but also temporo-spectral coherent one in the time-frequency plane thanks to wavelet transform-based coherence for more understanding of the turbulence and force coherences and their spatial distributions. Effects of spanwise separations, bluff body flow and flow conditions on coherent structures of turbulence and induced pressure, comparison between turbulence and pressure coherences as well as intermittency of coherent structure in the time-frequency plane will be investigated here. |
| first_indexed | 2024-03-08T07:17:52Z |
| format | Article |
| id | doaj.art-cd7843e34c6f44eba7e6c09ac3479518 |
| institution | Directory Open Access Journal |
| issn | 0217-5460 2224-9028 |
| language | English |
| last_indexed | 2024-03-08T07:17:52Z |
| publishDate | 2017-11-01 |
| publisher | Universiti Brunei Darussalam |
| record_format | Article |
| series | ASEAN Journal on Science and Technology for Development |
| spelling | doaj.art-cd7843e34c6f44eba7e6c09ac34795182024-02-03T00:38:31ZengUniversiti Brunei DarussalamASEAN Journal on Science and Technology for Development0217-54602224-90282017-11-0125240541710.29037/ajstd.271266TEMPORO-SPECTRAL COHERENT STRUCTURE OF TURBULENCE AND PRESSURE USING FOURIER AND WAVELET TRANSFORMSThai-Hoa Le0Dong-Anh Nguyen1Department of Civil and Earth Resources Engineering, Kyoto University, KyotoDaigaku-Katsura Campus, Nishikyo-ku, Kyoto 611-8540Institute of Mechanics, Vietnamese Academy of Science and Technology, 264 Doican Str., Dongda Dist., HanoiStudying the spatial distribution in coherent fields such as turbulent and turbulent-induced force ones is important to model and evaluate turbulent-induced forces and response of structures on the turbulent flows. Turbulent field-based coherent function is commonly used for the spatial distribution characteristic of induced forces in the frequency domain. This paper will focus to study spectral coherent structure of turbulence and forces in not only the frequency domain using conventional Fourier transform-based coherence, but also temporo-spectral coherent one in the time-frequency plane thanks to wavelet transform-based coherence for more understanding of the turbulence and force coherences and their spatial distributions. Effects of spanwise separations, bluff body flow and flow conditions on coherent structures of turbulence and induced pressure, comparison between turbulence and pressure coherences as well as intermittency of coherent structure in the time-frequency plane will be investigated here.http://www.ajstd.org/index.php/ajstd/article/view/271 |
| spellingShingle | Thai-Hoa Le Dong-Anh Nguyen TEMPORO-SPECTRAL COHERENT STRUCTURE OF TURBULENCE AND PRESSURE USING FOURIER AND WAVELET TRANSFORMS ASEAN Journal on Science and Technology for Development |
| title | TEMPORO-SPECTRAL COHERENT STRUCTURE OF TURBULENCE AND PRESSURE USING FOURIER AND WAVELET TRANSFORMS |
| title_full | TEMPORO-SPECTRAL COHERENT STRUCTURE OF TURBULENCE AND PRESSURE USING FOURIER AND WAVELET TRANSFORMS |
| title_fullStr | TEMPORO-SPECTRAL COHERENT STRUCTURE OF TURBULENCE AND PRESSURE USING FOURIER AND WAVELET TRANSFORMS |
| title_full_unstemmed | TEMPORO-SPECTRAL COHERENT STRUCTURE OF TURBULENCE AND PRESSURE USING FOURIER AND WAVELET TRANSFORMS |
| title_short | TEMPORO-SPECTRAL COHERENT STRUCTURE OF TURBULENCE AND PRESSURE USING FOURIER AND WAVELET TRANSFORMS |
| title_sort | temporo spectral coherent structure of turbulence and pressure using fourier and wavelet transforms |
| url | http://www.ajstd.org/index.php/ajstd/article/view/271 |
| work_keys_str_mv | AT thaihoale temporospectralcoherentstructureofturbulenceandpressureusingfourierandwavelettransforms AT donganhnguyen temporospectralcoherentstructureofturbulenceandpressureusingfourierandwavelettransforms |