A second-order accurate pressure correction scheme for viscous incompressible flow
SIAM Journal on Scientific and Statistical Computing
Spectral methods for the Navier-Stokes equations with one infinite and two periodic directions
Journal of Computational Physics
The basic equations for the large eddy simulation of turbulent flows in complex geometry
Journal of Computational Physics
Zonal embedded grids for numerical simulations of wall-bounded turbulent flows
Journal of Computational Physics
A Course in Simulation
Wave overtopping over a sea dike
Journal of Computational Physics
Explicit small-scale velocity simulation for high-Re turbulent flows. Part II: Non-homogeneous flows
Journal of Computational Physics
A velocity-estimation subgrid model constrained by subgrid scale dissipation
Journal of Computational Physics
LES approach for high Reynolds number wall-bounded flows with application to turbulent channel flow
Journal of Computational Physics
Hi-index | 31.47 |
A novel near-wall LES closure model is developed based on a revised form of the one-dimensional turbulence (ODT) model of Kerstein and is tested by performing LES calculations of turbulent channel flow at Reynolds numbers based on friction velocity ranging from 395 to 10,000. In contrast to previous models, which invoke Reynolds averaging, near-wall velocity fluctuations and turbulent transport are simulated down to the smallest scales, and can be compared directly to DNS data. Thus, the approach provides more than just a boundary condition. Rather, it is itself a complete (although simplified) model for the wall-normal profiles of velocity within the near-wall region. LES/ODT coupling is bi-directional and occurs both through the direct calculation of the subgrid turbulent stress by temporally and spatially filtering the ODT-resolved momentum fluxes (up-scale coupling), and through the LES-resolved pressure and velocities impacting the ODT behavior (down-scale coupling). The formulation involves finely resolved ODT lines that are embedded within each wall-adjacent LES cell - denoted the inner region. LES cells that are within approximately one LES filter width of the inner region belong to an overlap region where both ODT and LES modeling is active. All other cells are treated using a standard LES approach. Although more expensive than simpler models, the cost of the model relative to the LES portion of the simulation scales favorably with problem size, leading to computationally affordable simulations even at relatively high Reynolds numbers.