A theoretical model is constructed of turbulent stratified flow in a flat horizontal channel with allowance for coherent structures that arise in it. The ordered part is separated from the turbulence of the flow and to describe the Reynolds-type equations are derived. The remaining part of the turbulence is taken into account parametrically in the form of an effective exchange coefficient. The flow is divided into a core, in which the ordered structures are manifested quite clearly, and wall regions, in which ordered large-scale structures are weakly manifested. To study the coherent structures in the core of the flow, an approach analogous to one already used to model ordered structures in open flows  is used. Monin-Obukhov scaling theory is used to describe the turbulence in the wall region.
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Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 3, pp. 32–38, May–June, 1991.
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Kovalev, V.A., Ordanovich, A.E. Theoretical investigation of coherent structures in stratified turbulent channel flow. Fluid Dyn 26, 343–348 (1991). https://doi.org/10.1007/BF01059002
- Theoretical Model
- Channel Flow
- Theoretical Investigation
- Coherent Structure
- Wall Region