# A PARAMETRIZED NON-EQUILIBRIUM WALL-MODEL FOR LARGE-EDDY SIMULATIONS

@article{Hickel2015APN, title={A PARAMETRIZED NON-EQUILIBRIUM WALL-MODEL FOR LARGE-EDDY SIMULATIONS}, author={S. Hickel and Emile Touber and Julien A. Bodart and Johan Larsson}, journal={Proceeding of Eighth International Symposium on Turbulence and Shear Flow Phenomena}, year={2015} }

Wall-models are essential for enabling large-eddy simulations (LESs) of realistic problems at high Reynolds numbers. The present study is focused on approaches that directly model the wall shear stress, specifically on filling the gap between models based on wall-normal ordinary differential equations (ODEs) that assume equilibrium and models based on full partial differential equations (PDEs) that do not. We develop ideas for how to incorporate non-equilibrium effects (most importantly, strong…

## 18 Citations

### A new ODE-based turbulence wall model accounting for pressure gradient and Reynolds number effects

- Physics
- 2020

In wall-modeled large-eddy simulations (WMLES), the near-wall model plays a significant role in predicting the skin friction, although the majority of the boundary layer is resolved by the outer…

### Wall-Modeled Large-Eddy Simulation of a High Reynolds Number Separating and Reattaching Flow.

- Physics, EngineeringAIAA journal. American Institute of Aeronautics and Astronautics
- 2017

The performance of two wall models based on Reynolds-averaged Navier-Stokes is compared in large-eddy simulation of a high Reynolds number separating and reattaching flow over the NASA wall-mounted hump to improve flow prediction on a coarse grid.

### Prediction of Turbulent Secondary Flows in Ducts Using Equilibrium Wall-Modeled LES

- Physics
- 2015

For many practical applications, large eddy simulation (LES) and direct numerical simulation (DNS) are still too computationally expensive to be viable engineering tools. By modeling the small scales…

### An immersed boundary formulation incorporating a two-layer wall model approach for RANS simulations with complex geometry

- Engineering, Physics
- 2020

### Extended integral wall-model for large-eddy simulations of compressible wall-bounded turbulent flows

- PhysicsPhysics of Fluids
- 2018

Wall-modeling is required to make large-eddy simulations of high-Reynolds number wall-bounded turbulent flows feasible in terms of computational cost. Here, an extension of the integral wall-model…

### Large eddy simulation with modeled wall-stress: recent progress and future directions

- Engineering
- 2016

The paper provides a brief introduction to the near-wall problem of LES and how it can be solved through modeling of the near-wall turbulence. The distinctions and key differences between different…

### Sensitivity Analysis of Near-Wall Turbulence Modeling for Large Eddy Simulation of Incompressible Flows

- Engineering, Physics
- 2014

Wall layer models are very important for the simulation of turbulent flows in complex geometries to characterize the significant flow features. For the simulation of turbulent flows, the performance…

### Non-iterative wall model formula for non-equilibrium boundary layer flows

- EngineeringFME Transactions
- 2022

A novel non-iterative (explicit) formulation of generalized wall functions that applies to equilibrium and non-equilibrium boundary layer flows was proposed. The proposed formulation uses a set of…

### Numerical simulations of oblique shock/boundary-layer interaction at a high Reynolds number

- Physics, Engineering
- 2014

This study investigates numerical analysis of the oblique shock/boundary-layer interaction (OSBLI) in a Mach 1.7 flow with a unit Reynolds number of 35 million. Two methods of simulations are…

### Assessment of Wall-modeled Large Eddy Simulation For Supersonic Compression Ramp Flows

- Physics, Engineering
- 2013

An assessment of a wall-model technique for large-eddy simulation (LES) is conducted in the context of a supersonic turbulent boundary layer flowing over a compression ramp. Both wall-resolved LES…

## References

SHOWING 1-10 OF 15 REFERENCES

### Dynamic non-equilibrium wall-modeling for large eddy simulation at high Reynolds numbers

- Physics
- 2013

A dynamic non-equilibrium wall-model for large-eddy simulation at arbitrarily high Reynolds numbers is proposed and validated on equilibrium boundary layers and a non-equilibrium shock/boundary-layer…

### Wall modeling for implicit large-eddy simulation and immersed-interface methods

- Physics
- 2014

We propose and analyze a wall model based on the turbulent boundary layer equations (TBLE) for implicit large-eddy simulation (LES) of high Reynolds number wall-bounded flows in conjunction with a…

### Two-layer approximate boundary conditions for large-eddy simulations

- Physics
- 1996

A new method to model the effect of the solid boundaries on the rest of the flowfield in large-eddy simulations is proposed. The filtered Navier-Stokes equations are solved up to the first…

### Dynamic wall modeling for large-eddy simulation of complex turbulent flows

- Physics
- 2002

The efficacy of large-eddy simulation (LES) with wall modeling for complex turbulent flows is assessed by considering turbulent boundary-layer flows past an asymmetric trailing-edge. Wall models…

### Wall-layer models for large-eddy simulations

- Physics
- 2002

The numerical simulation of high Reynolds number flows is hampered by model accuracy if the Reynolds-averaged Navier–Stokes (RANS) equations are used, and by computational cost if direct or…

### A wall-layer model for large-eddy simulations of turbulent flows with/out pressure gradient

- Physics, Engineering
- 2011

In this work, modeling of the near-wall region in turbulent flows is addressed. A new wall-layer model is proposed with the goal to perform high-Reynolds number large-eddy simulations of wall bounded…

### Approximate Wall Boundary Conditions for Large Eddy Simulations

- Engineering, Physics
- 1995

A set of new, approximate solid wall boundary conditions for large eddy simulation (LES) is proposed, which models the wall shear stress in function of the resolved flowfield outside the viscous…

### Numerical simulation of the flow around a circular cylinder at high Reynolds numbers

- Physics, Engineering
- 2003

### Wall-modeling in large eddy simulation: Length scales, grid resolution, and accuracy

- Physics, Environmental Science
- 2012

This paper addresses one of the most persistent errors in wall-modeled large eddy simulation: the inevitable presence of numerical and subgrid modeling errors in the first few grid points off the…