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ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
External Laminar Boundary Layer Simulations Using a High-Fidelity Wall-Modeling Approach
Submission Author:
Eron Tiago Viana Dauricio , SP , Brazil
Co-Authors:
Eron Tiago Viana Dauricio, Carlos JUNQUEIRA-JUNIOR, Diego Ferolla de Abreu, João Luiz F. Azevedo
Presenter: João Luiz F. Azevedo
doi://10.26678/ABCM.ENCIT2022.CIT22-0184
Abstract
Accurate simulations of turbulent flows under different flow conditions are still and open challenge in the CFD community, in part due of the random nature of the turbulence phenomena, but also because of the prohibitive computational costs resulting from turbulent scale resolution requirements. In the Wall-Modeled Large Eddy Simulation (WMLES) approach, modeling of the near-wall dynamics is employed in order to alleviate such costs. However, in external boundary layer flows, the accurate simulation of the thin, pre-transition laminar boundary layer developing near the body leading edge greatly increases the computational costs, since this region is not modeled in the approach. In this work, we address this problem and propose a wall-modeling approach for this region. The new wall model is based on local self-similar solutions of the boundary layer, and is implemented in the same context of wall-stress models in the WMLES approach. An assessment of the model is performed in terms of the predicted pressure and skin friction coefficients, for an essentially incompressible, laminar flow around a NACA 0012 airfoil geometry. The results demonstrate the feasibility of the proposed wall-modeling approach, and the coefficients obtained with the model are in good agreement with the reference solution.
Keywords
Wall-Modeling, Wall-Modeled Large Eddy Simulation, External Laminar Flow, Boundary layer flow
