Spectral proper orthogonal decomposition of harmonically forced turbulent flows
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| 发表在: | Journal of Fluid Mechanics vol. 985 (Apr 2024) |
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Cambridge University Press
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| 在线阅读: | Citation/Abstract Full Text - PDF |
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| 024 | 7 | |a 10.1017/jfm.2024.70 |2 doi | |
| 035 | |a 3047788844 | ||
| 045 | 2 | |b d20240401 |b d20240430 | |
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| 100 | 1 | |a Heidt, Liam |u Graduate Aerospace Laboratories of the California Institute of Technology, California Institute of Technology, Pasadena, CA 91101, USA | |
| 245 | 1 | |a Spectral proper orthogonal decomposition of harmonically forced turbulent flows | |
| 260 | |b Cambridge University Press |c Apr 2024 | ||
| 513 | |a Journal Article | ||
| 520 | 3 | |a Many turbulent flows exhibit time-periodic statistics. These include turbomachinery flows, flows with external harmonic forcing and the wakes of bluff bodies. Many existing techniques for identifying turbulent coherent structures, however, assume the statistics are statistically stationary. In this paper, we leverage cyclostationary analysis, an extension of the statistically stationary framework to processes with periodically varying statistics, to generalize the spectral proper orthogonal decomposition (SPOD) to the cyclostationary case. The resulting properties of the cyclostationary SPOD (CS-SPOD for short) are explored, a theoretical connection between CS-SPOD and the harmonic resolvent analysis is provided, simplifications for the low and high forcing frequency limits are discussed, and an efficient algorithm to compute CS-SPOD with SPOD-like cost is presented. We illustrate the utility of CS-SPOD using two example problems: a modified complex linearized Ginzburg–Landau model and a high-Reynolds-number turbulent jet. | |
| 653 | |a Wakes | ||
| 653 | |a Approximation | ||
| 653 | |a Algorithms | ||
| 653 | |a Decomposition | ||
| 653 | |a Bluff bodies | ||
| 653 | |a High Reynolds number | ||
| 653 | |a Turbomachinery | ||
| 653 | |a Statistical analysis | ||
| 653 | |a Fluid dynamics | ||
| 653 | |a Proper Orthogonal Decomposition | ||
| 653 | |a Statistics | ||
| 653 | |a Turbulent jets | ||
| 653 | |a Environmental | ||
| 700 | 1 | |a Colonius, Tim |u Department of Mechanical and Civil Engineering, California Institute of Technology, Pasadena, CA 91101, USA | |
| 773 | 0 | |t Journal of Fluid Mechanics |g vol. 985 (Apr 2024) | |
| 786 | 0 | |d ProQuest |t Science Database | |
| 856 | 4 | 1 | |3 Citation/Abstract |u https://www.proquest.com/docview/3047788844/abstract/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text - PDF |u https://www.proquest.com/docview/3047788844/fulltextPDF/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |