Progress in physical modeling of compressible wall-bounded turbulent flows

C Cheng, X Chen, W Zhu, W Shyy, L Fu - Acta Mechanica Sinica, 2024 - Springer
Understanding, modeling and control of the high-speed wall-bounded transition and
turbulence not only receive wide academic interests but also are vitally important for high …

Velocity transformation for compressible wall-bounded turbulent flows with and without heat transfer

KP Griffin, L Fu, P Moin - Proceedings of the National …, 2021 - National Acad Sciences
In this work, a transformation, which maps the mean velocity profiles of compressible wall-
bounded turbulent flows to the incompressible law of the wall, is proposed. Unlike existing …

Direct numerical simulation of hypersonic turbulent boundary layers: effect of spatial evolution and Reynolds number

J Huang, L Duan, MM Choudhari - Journal of Fluid Mechanics, 2022 - cambridge.org
Direct numerical simulations (DNS) are performed to investigate the spatial evolution of flat-
plate zero-pressure-gradient turbulent boundary layers over long streamwise domains () …

Compressible velocity transformations for various noncanonical wall-bounded turbulent flows

T Bai, KP Griffin, L Fu - AIAA journal, 2022 - arc.aiaa.org
Although several velocity transformations for compressible zero-pressure-gradient boundary
layers have been proposed in the past decades, their performance for noncanonical …

Linear response analysis of supersonic turbulent channel flows with a large parameter space

X Chen, C Cheng, L Fu, J Gan - Journal of Fluid Mechanics, 2023 - cambridge.org
In this work, the linear responses of turbulent mean flow to both harmonic and stochastic
forcing are investigated for supersonic channel flow. Well-established universal relations are …

Linear-model-based study of the coupling between velocity and temperature fields in compressible turbulent channel flows

C Cheng, L Fu - Journal of Fluid Mechanics, 2023 - cambridge.org
It is generally believed that the temperature and the velocity fields are highly coupled in
compressible wall-bounded turbulence. In the present study, we employ a linear model, ie …

Near-wall model for compressible turbulent boundary layers based on an inverse velocity transformation

KP Griffin, L Fu, P Moin - Journal of Fluid Mechanics, 2023 - cambridge.org
In this work, a near-wall model, which couples the inverse of a recently developed
compressible velocity transformation (Griffin et al., Proc. Natl Acad. Sci., vol. 118, 2021, p …

Study of the linear models in estimating coherent velocity and temperature structures for compressible turbulent channel flows

X Chen, C Cheng, J Gan, L Fu - Journal of Fluid Mechanics, 2023 - cambridge.org
Linear models, based on stochastically forced linearized equations, are deployed for
spectral linear stochastic estimation (SLSE) of the velocity and temperature fluctuations in …

Momentum and heat flux events in compressible turbulent channel flows

C Cheng, W Shyy, L Fu - Physical Review Fluids, 2023 - APS
In the present study, the momentum and heat fluxes (MF and HF) in subsonic or supersonic
channel flows are studied and compared via resorting to the established analysis tools …

Large-scale motions and self-similar structures in compressible turbulent channel flows

C Cheng, L Fu - Physical Review Fluids, 2022 - APS
In this work, we study the scale characteristics of the log-and outer-region motions and
structures in subsonic and supersonic turbulence. To this end, a series of direct numerical …