Abstract
The paper studies turbulent mixing in thermoviscous fluid flow in a 3D cubic domain which is extended periodically in two directions (X and Y). The flow turbulization develops under the impact of two-dimensional chaotic disturbances at mass average Reynolds number Re1 = 4704. The vortex field structure is discussed in terms of an isosurface of Q-criterion and local enstrophy ζ1. For the advanced stages of flow evolution, the study considers Eulerian correlation coefficients for velocity fluctuations (auto-correlation functions) and the cross-correlations of pressure and temperature. The Eulerian correlation coefficient is split for analysis of correlation characteristics in periodicity and wall-normal directions. The integral scale is evaluated depending on the distance to the walls. The flow analysis is performed in the terms of viscous scale. The mesh resolution is evaluated for the flow regions corresponding to the logarithmic boundary layer and the near-wall thermal layers.
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Research was financially supported by the Russian Foundation for Basic Research (Project # 19-708-00484), State order for JIHT RAS.
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Kulikov, Y.M., Son, E.E. Thermoviscous fluid flow in nonisothermal layer: structures, scales, and correlations. Thermophys. Aeromech. 27, 243–258 (2020). https://doi.org/10.1134/S0869864320020079
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DOI: https://doi.org/10.1134/S0869864320020079