Simultaneous measurements of fluctuating velocity and pressure in a turbulent mixing layer

Yoshitsugu Naka, Takeshi Omori, Shinnosuke Obi, Shigeaki Masuda

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


A novel experimental technique to measure static pressure fluctuation was applied in order to evaluate velocity-pressure correlation in a turbulent mixing layer. The developing region of the mixing layer was found to be out of equilibrium state, indicating the oscillatory velocity fluctuation due to vortex shedding and remarkable production of turbulence. The contribution of pressure-related terms in the transport equation of the Reynolds stress is found to be well captured by the present method. A simple model for pressure diffusion by Lumley gave a satisfactory approximation when the flow approached the self-similar state. However, the analogy between pressure diffusion and turbulent diffusion becomes weaker when the flow exhibits characteristics which are not found in the equilibrium state.

Original languageEnglish
Pages (from-to)737-746
Number of pages10
JournalInternational Journal of Heat and Fluid Flow
Issue number4
Publication statusPublished - 2006 Aug


  • Measurement method
  • Non-equilibrium free shear layer
  • Velocity-pressure correlation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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