An assessment of two classes of variational multiscale methods for the simulation of incompressible turbulent flows
- Ahmed, Naveed
- John, Volker
2010 Mathematics Subject Classification
- incompressible turbulent flows, residual-based VMS method, SUPG method, projection-based VMS method, turbulent channel flows, LSC preconditioner
A numerical assessment of two classes of variational multiscale (VMS) methods for the simulation of incompressible flows is presented. Two types of residual-based VMS methods and two types of projection-based VMS methods are included in this assessment. The numerical simulations are performed at turbulent channel flow problems with various friction Reynolds numbers. It turns out the the residual-based VMS methods, in particular when used with a pair of inf-sup stable finite elements, give usually the most accurate results for second order statistics. For this pair of finite element spaces, a flexible GMRES method with a Least Squares Commutator (LSC) preconditioner proved to be an efficient solver.
- Comput. Methods Appl. Mech. Engrg., 369 (2020), pp. 1--20, DOI https://doi.org/10.1016/j.cma.2020.112997 .