## Abstract

Three-dimensional time-averaged density and temperature fields of a heated air jet from a circular 10 mm diameter nozzle are reconstructed using tomographic background-oriented schlieren. A hybrid filtered back-projection–algebraic reconstruction (FBP-ART) technique reconstructs the refractive index gradient field in the flow. The number of ART iterations is varied to observe the effect on reconstruction artefacts. The largest improvement is observed after 1 ART iteration with filtering of the initial FBP solution. Subsequently, the gradient field is used to form a Poisson equation solved in a quasi-3D manner using successive over-relaxation. Convergence of the refractive index field is studied with iteration number and the effect this has on the temperature and density profiles, after applying the Gladstone-Dale relation and ideal gas law. The quasi-3D solution parallelises well, and converges rapidly.

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 |

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 http://www.afms.org.au/proceedings/21.html (Proceedings) https://aomevents.eventsair.com/QuickEventWebsitePortal/21st-australasian-fluid-mechanics-conference/afmc2018 |

### Conference

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

Country/Territory | Australia |

City | Adelaide |

Period | 10/12/18 → 13/12/18 |

Internet address |