Boundary Between Laminar and Turbulent Flow

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Abstract
This group was asked to consider the characteristic structure of the boundary between laminar and turbulent flows (the L‐T boundary) and to answer the following specific questions. If we consider the boundaries at the top and bottom of a patch of intense turbulence in a stratified medium,a. Can we predict the two‐dimensional spectrum of the height deviations of the boundary?Answer: no.b. Will there be density fluctuations induced in the laminar layers where the stratification still remains?Answer: yes.c. If so, what spectrum can we predict for these fluctuations?Answer: refer to Townsend [1964].d. How intense will the fluctuations of a passive scalar quantity be at the boundary relative to a point in the middle of the thoroughly mixed zone (patch)?Answer: it is not known.