The matching problem in the theory of nonequilibrium turbulent flows near a wall

Yu V. Lapin, A. L. Yarin

Research output: Contribution to journalArticle

Abstract

Analysis of the available data on strongly nonequilibrium turbulent wall flows indicates the difficulties arising in their calculation. One of the reasons for these difficulties is the "local" nature of the semiempirical theories of turbulence. Another relates to the way in which the solutions in the inner and outer regions are matched. It is shown that the traditional method of matching the solutions on the basis of the local values of the coefficients of turbulent viscosity in the inner region, where the "wall law" holds, and the outer region, where the "wake law" holds, results in an incorrect determination of the scale of the inner region and is therefore incorrect. Integral matching based on the tangential turbulent stresses is considered. Concrete calculations in the framework of a two-parameter integral method show that integral matching leads to a qualitatively correct description of the dynamic interaction between the inner and outer regions. The results of calculations of the integral characteristics of a turbulent boundary layer are compared with experimental data.

Original languageEnglish
Pages (from-to)350-357
Number of pages8
JournalFluid Dynamics
Volume14
Issue number3
DOIs
Publication statusPublished - 1979 May 1

    Fingerprint

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

Cite this