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Summary
This summary is machine-generated.

Large-eddy simulation (LES) uses wall models to study turbulent flows, overcoming resolution limits near walls. This review examines novel models and their application to complex flow phenomena.

Keywords:
large-eddy simulationturbulencewall modeling

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Area of Science:

  • Fluid Dynamics
  • Computational Science

Background:

  • Turbulent flows are crucial in many engineering applications.
  • Simulating high-Reynolds number boundary layers with Large-eddy simulation (LES) is computationally expensive due to near-wall eddy resolution requirements.

Purpose of the Study:

  • To review recent advancements in wall-modeled LES.
  • To assess the application of wall models to complex flow scenarios.
  • To evaluate the accuracy of wall-model assumptions.

Main Methods:

  • Review of recent investigations in wall-modeled LES.
  • Analysis of novel approximate boundary conditions.
  • Assessment of wall model applications in complex flows like separation and shock interactions.
  • Evaluation of underlying assumptions in wall-model derivations.

Main Results:

  • Wall models and approximate boundary conditions are essential for LES of high-Reynolds number flows.
  • Wall models have been successfully applied to complex flows including boundary-layer separation and shock/boundary-layer interactions.
  • The accuracy of wall-modeled LES is dependent on the validity of the underlying assumptions.

Conclusions:

  • Wall-modeled LES is a viable approach for simulating unsteady turbulent flows.
  • Further research is needed to refine wall models and their underlying assumptions for improved accuracy in complex flow simulations.
  • Future studies should focus on developing more robust wall models and validating them across a wider range of flow conditions.