Numerical investigation of instability mechanisms in laminar and turbulent wall jets

S. Wernz, H. F. Fasel

Research output: Contribution to conferencePaper

2 Scopus citations

Abstract

Secondary instability in forced laminar and turbulent wall jets is investigated using two-dimensional Navier-Stokes simulations. For modeling the turbulent flow, the Unsteady Reynolds-Averaged Navier-Stokes (URANS) approach is employed in which the turbulent mean flow and the time-dependent large coherent structures are computed time-accurately while the effect of small-scale random turbulent motion is modeled using an Explicit Algebraic Stress Model (EASM). Several parameter studies are presented indicating that subharmonic resonance may be the cause for the vortex pairing observed in experiments of forced and unforced wall jets.

Original languageEnglish (US)
Pages7008-7017
Number of pages10
StatePublished - Jul 1 2004
Event42nd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: Jan 5 2004Jan 8 2004

Other

Other42nd AIAA Aerospace Sciences Meeting and Exhibit
CountryUnited States
CityReno, NV
Period1/5/041/8/04

ASJC Scopus subject areas

  • Engineering(all)

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    Wernz, S., & Fasel, H. F. (2004). Numerical investigation of instability mechanisms in laminar and turbulent wall jets. 7008-7017. Paper presented at 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States.