The high-enthalpy turbulent boundary layer is a complex flow phenomenon characterized by multi-physical field coupling, which imposes strict requirements on the spatiotemporal resolution of numerical simulations, often resulting in significant computational costs. To alleviate this issue, this study develops a wall model specifically designed for high-enthalpy turbulent boundary layers under non-catalytic wall condition, thereby relaxing the mesh resolution requirements for numerical computations. The wall model accurately resolves near-wall velocity and enthalpy profiles by solving the momentum and energy equations in their ordinary differential equation (ODE) forms. By further incorporating the enthalpy–velocity relation and generalized Reynolds analogy, the model provides accurate feedback of wall shear stress τw and heat flux qw to the large eddy simulation (LES) solver. The efficacy of the wall model is validated through both a priori and a posteriori tests conducted in high-enthalpy turbulent boundary layers. The results show that the present ODE-based wall model can accurately calculate the boundary layer characteristics, which provides a potential approach for extending the wall-modeled LES to high-enthalpy turbulent flow simulations.
Huang et al. (Sat,) studied this question.
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