Abstract
The article presents the results of numerical simulation of the boundary layer of air on a heated surface in the presence of weak acceleration. The numerical model consists of a system of Prandtl equations, describing dynamic and thermal processes in the boundary layer, and a k-ω-γ turbulence model that allows reasonably simulating the laminar-turbulent transition and turbulence suppression. Finite-difference methods were used to solve differential equations. For some calculated cases, the turbulence model was switched off in order to obtain parameters of a known laminar flow. Modeling has shown that under the considered flow conditions, the occurrence and development of a local laminarized region is possible in the vicinity of the wall. In this case, the boundary layer includes the near-wall laminar and external turbulent sections. This nature of the flow leads to a level of friction and heat transfer that correspond to the intermediate flow relative to laminar and turbulent flows under the same conditions.
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The research was carried out under the state contract with IT SB RAS No. 121031800217-8.
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Sakhnov, A.Y. Local laminarization in a channel with a small narrowing and a heated wall. Thermophys. Aeromech. 29, 653–658 (2022). https://doi.org/10.1134/S0869864322050031
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DOI: https://doi.org/10.1134/S0869864322050031