Experiments on a wave train emanating from a point source in a laminar boundary layer

Th Wiegand, H. Bestek, S. Wagner, H. Fasel

Research output: Contribution to conferencePaperpeer-review

6 Scopus citations


Experimental investigations of the evolution of a harmonic point-source disturbance in a laminar flatplate boundary layer are discussed. The experiments were performed in a laminar water-channel designed for low-speed transition experiments. Small initial disturbances were introduced at a point source by periodic excitation with a single frequency. Detailed hot-film measurements in the linear regime of disturbance development show a wedge-like downstream evolution of the resulting wave train. A subharmonic-type breakdown process of the wave train with the characteristic pattern of staggered A-shaped vortices was observed by using flow visualization with hydrogen-bubbles and laser-sheet illumination.

Original languageEnglish (US)
Number of pages12
StatePublished - 1995
EventFluid Dynamics Conference, 1995 - San Diego, United States
Duration: Jun 19 1995Jun 22 1995


OtherFluid Dynamics Conference, 1995
Country/TerritoryUnited States
CitySan Diego

ASJC Scopus subject areas

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


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