Computer Methods in Applied Mechanics and Engineering - Special edition on the 20th Anniversary
Generation of turbulent inflow data for spatially-developing boundary layer simulations
Journal of Computational Physics
Conservative high-order finite-difference schemes for low-Mach number flows
Journal of Computational Physics
A multilevel algorithm for large-Eddy simulation of turbulent compressible flows
Journal of Computational Physics
Journal of Computational Physics
Time-accurate calculation of variable density flows with strong temperature gradients and combustion
Journal of Computational Physics
Scale-separating operators for variational multiscale large eddy simulation of turbulent flows
Journal of Computational Physics
High-fidelity interface tracking in compressible flows: Unlimited anchored adaptive level set
Journal of Computational Physics
An implicit finite element solution of thermal flows at low Mach number
Journal of Computational Physics
Journal of Computational Physics
A finite element dynamical nonlinear subscale approximation for the low Mach number flow equations
Journal of Computational Physics
Journal of Computational Physics
A computational approach for the simulation of natural convection in electrochemical cells
Journal of Computational Physics
Journal of Computational Physics
Hi-index | 31.47 |
An algebraic variational multiscale-multigrid method is proposed for large-eddy simulation of turbulent variable-density flow at low Mach number. Scale-separating operators generated by level-transfer operators from plain aggregation algebraic multigrid methods enable the application of modeling terms to selected scale groups (here, the smaller of the resolved scales) in a purely algebraic way. Thus, for scale separation, no additional discretization besides the basic one is required, in contrast to earlier approaches based on geometric multigrid methods. The proposed method is thoroughly validated via three numerical test cases of increasing complexity: a Rayleigh-Taylor instability, turbulent channel flow with a heated and a cooled wall, and turbulent flow past a backward-facing step with heating. Results obtained with the algebraic variational multiscale-multigrid method are compared to results obtained with residual-based variational multiscale methods as well as reference results from direct numerical simulation, experiments and LES published elsewhere. Particularly, mean and various second-order velocity and temperature results obtained for turbulent channel flow with a heated and a cooled wall indicate the higher prediction quality achievable when adding a small-scale subgrid-viscosity term within the algebraic multigrid framework instead of residual-based terms accounting for the subgrid-scale part of the non-linear convective term.