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Year 2024, Volume: 32, 515 - 519, 30.12.2024

Alexander Kusyumov Sergey Kusyumov

https://doi.org/10.55549/epstem.1605553

Abstract

References

  • Kusyumov, A., & Kusyumov, S. (2024). Spectrum estimation of spatial velocity component pulsations. The Eurasia Proceedings of Science, Technology, Engineering & Mathematics (EPSTEM), 32, 515-519.

Spectrum Estimation of Spatial Velocity Component Pulsations

Year 2024, Volume: 32, 515 - 519, 30.12.2024

Alexander Kusyumov Sergey Kusyumov

https://doi.org/10.55549/epstem.1605553

Abstract

One of the objectives in the study of turbulent flows is to determine the spectral features of flow parameters. Typically, the longitudinal and transverse components of the velocity vector are parameters for which spectral analysis is carried out. In the present study, the spectrum of pulsations of a turbulent velocity sampled in the spatial domain is considered. An application with the Reynolds number of 3900 is being examined for a turbulent flow past a 3D cylindrical surface. Numerical simulation is performed using ANSYS Fluent commercial code and based on the Navier-Stokes equations. The spatial signal is sampled on the centerline downstream of the flow. The energy of the transversal component of the velocity vector is analyzed using Fourier transforms of a signal sampled in the spatial domain. Two approaches are considered to study the spectral properties of the signal. The traditional Energy Signal Density (ESD) estimation is analyzed using Parseval’s theorem. The alternative Energy Signal Spectra (ESS) estimation approach is based on the local signal energy definition. The energy spectra performances are compared to the “–5/3” law of A.N. Kolmogorov.

Keywords

Cylinder Navier-Stokes equations Turbulence Spatial spectrum

References

  • Kusyumov, A., & Kusyumov, S. (2024). Spectrum estimation of spatial velocity component pulsations. The Eurasia Proceedings of Science, Technology, Engineering & Mathematics (EPSTEM), 32, 515-519.
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Details

Primary Language English
Subjects Classical Physics (Other)
Journal Section Articles
Authors

Alexander Kusyumov

Sergey Kusyumov

Early Pub Date December 22, 2024
Publication Date December 30, 2024
Submission Date July 4, 2024
Acceptance Date August 23, 2024
Published in Issue Year 2024 Volume: 32

Cite

APA Kusyumov, A., & Kusyumov, S. (2024). Spectrum Estimation of Spatial Velocity Component Pulsations. The Eurasia Proceedings of Science Technology Engineering and Mathematics, 32, 515-519. https://doi.org/10.55549/epstem.1605553
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