Simulations of planar flapping jets in confined channels

Francine Battaglia, Anil K. Kulkarni, Jinzhang Feng, Charles L. Merkle

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations


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 languageEnglish (US)
StatePublished - 1997
Event28th Fluid Dynamics Conference, 1997 - Snowmass Village, United States
Duration: Jun 29 1997Jul 2 1997


Other28th Fluid Dynamics Conference, 1997
Country/TerritoryUnited States
CitySnowmass Village

All Science Journal Classification (ASJC) codes

  • General Engineering


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