Numerical investigation of turbulent wall jets over a convex surface

S. Wernz, P. Valsecchi, A. Groß, Hermann F Fasel

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

6 Citations (Scopus)

Abstract

In a numerical effort, wall jets over a convex wall (Coanda flows) are being investigated using direct numerical simulations (DNS) based on the spatial as well as on the temporal model. The focus of our numerical investigations is the development and interaction of large coherent structures in the turbulent Coanda flow. As observed in experiments, large spanwise "rollers" and longitudinal Gortler-type vortices can greatly influence the development of the jet along the surface and its eventual separation from the surface. From our spatial DNS of the Coanda flow over a cylinder segment, we found that both types of coherent structures can coexist. The presenence of these structures was also confirmed by preliminary temporal DNS of a narrow streamwise flow segment in the Coanda flow. The temporal DNS is capable of capturing coherent structures that are generated by local flow instabilities at significantly reduced computational expense.

Original languageEnglish (US)
Title of host publication33rd AIAA Fluid Dynamics Conference and Exhibit
StatePublished - 2003
Event33rd AIAA Fluid Dynamics Conference and Exhibit 2003 - Orlando, FL, United States
Duration: Jun 23 2003Jun 26 2003

Other

Other33rd AIAA Fluid Dynamics Conference and Exhibit 2003
CountryUnited States
CityOrlando, FL
Period6/23/036/26/03

Fingerprint

Direct numerical simulation
Wall flow
Turbulent flow
Vortex flow
Experiments

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Mechanical Engineering

Cite this

Wernz, S., Valsecchi, P., Groß, A., & Fasel, H. F. (2003). Numerical investigation of turbulent wall jets over a convex surface. In 33rd AIAA Fluid Dynamics Conference and Exhibit

Numerical investigation of turbulent wall jets over a convex surface. / Wernz, S.; Valsecchi, P.; Groß, A.; Fasel, Hermann F.

33rd AIAA Fluid Dynamics Conference and Exhibit. 2003.

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

Wernz, S, Valsecchi, P, Groß, A & Fasel, HF 2003, Numerical investigation of turbulent wall jets over a convex surface. in 33rd AIAA Fluid Dynamics Conference and Exhibit. 33rd AIAA Fluid Dynamics Conference and Exhibit 2003, Orlando, FL, United States, 6/23/03.
Wernz S, Valsecchi P, Groß A, Fasel HF. Numerical investigation of turbulent wall jets over a convex surface. In 33rd AIAA Fluid Dynamics Conference and Exhibit. 2003
Wernz, S. ; Valsecchi, P. ; Groß, A. ; Fasel, Hermann F. / Numerical investigation of turbulent wall jets over a convex surface. 33rd AIAA Fluid Dynamics Conference and Exhibit. 2003.
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