Numerical investigation of instability mechanisms in laminar and turbulent wall jets

S. Wernz, Hermann F Fasel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

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)
Title of host publicationAIAA Paper
Pages7008-7017
Number of pages10
StatePublished - 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

Fingerprint

Turbulent flow
Vortex flow
Experiments

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Numerical investigation of instability mechanisms in laminar and turbulent wall jets. / Wernz, S.; Fasel, Hermann F.

AIAA Paper. 2004. p. 7008-7017.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wernz, S & Fasel, HF 2004, Numerical investigation of instability mechanisms in laminar and turbulent wall jets. in AIAA Paper. pp. 7008-7017, 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States, 1/5/04.
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