## Abstract

Computational analyses are used to provide a more complete understanding of the mechanisms which contribute to the development of oscillating planar jets. The geometry considered is a twodimensional jet exhausting into a blind channel whose open end is opposite to the initial direction such that the jet must turn through 180° to exit. The resulting flowfields exhibit three distinct characters that depend on the channel expansion ratio and the Reynolds number. At low Reynolds numbers the flow is steady and symmetric. A symmetrybreaking bifurcation at intermediate Reynolds numbers produces steady asymmetric flows. A Hopf bifurcation at higher Reynolds numbers yields unsteady flows. Predicted critical Reynolds numbers and oscillation frequencies are presented for different expansion ratios. Solutions are obtained from the time-dependent Navier-Stokes equations by means of an artificial compressibility formulation with dualtime stepping.

Original language | English (US) |
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State | Published - Jan 1 1997 |

Event | 28th Fluid Dynamics Conference, 1997 - Snowmass Village, United States Duration: Jun 29 1997 → Jul 2 1997 |

### Other

Other | 28th Fluid Dynamics Conference, 1997 |
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Country/Territory | United States |

City | Snowmass Village |

Period | 6/29/97 → 7/2/97 |

## All Science Journal Classification (ASJC) codes

- Engineering(all)