### Abstract

A novel method to determine the average convection velocity of coherent structures in the shear layer of supersonic jets is presented in this paper. The method is based on the Proper Orthogonal Decomposition (POD) of a flow field and the standard advection equation. Substitution of a function satisfying the advection equation with its POD representation followed by the utilization of the fundamental properties of POD modes and coefficients yields an expression for the convection velocity in terms of the derivatives and the inner products of modes. The method is suitable for experimental data (like PIV) as it does not require the data set to be time resolved. For validation and practical applicability of the method, a sensitivity analysis has been performed using a synthetic data set followed by the application of the technique on the simulation data of a realistic research problem.

Original language | English |
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Title of host publication | Proceedings of the 21st Australasian Fluid Mechanics Conference |

Editors | Timothy C.W. Lau, Richard M. Kelso |

Place of Publication | Perth WA Australia |

Publisher | Australasian Fluid Mechanics Society |

Number of pages | 5 |

ISBN (Electronic) | 9780646597843 |

Publication status | Published - 2018 |

Event | Australasian Fluid Mechanics Conference 2018 - Adelaide Convention Centre, Adelaide, Australia Duration: 10 Dec 2018 → 13 Dec 2018 Conference number: 21st https://aomevents.eventsair.com/QuickEventWebsitePortal/21st-australasian-fluid-mechanics-conference/afmc2018 |

### Publication series

Name | Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018 |
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### Conference

Conference | Australasian Fluid Mechanics Conference 2018 |
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Abbreviated title | AFMC 2018 |

Country | Australia |

City | Adelaide |

Period | 10/12/18 → 13/12/18 |

Internet address |

## Cite this

*Proceedings of the 21st Australasian Fluid Mechanics Conference*(Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018). Australasian Fluid Mechanics Society.