In this work we apply the high-order Discontinuous Galerkin (DG) finite element method to internal low-Mach number turbulent flows. The method here presented is designed to improve the performance of the solution in the incompressible limit using an implicit scheme for the temporal integration of the compressible Reynolds Averaged Navier Stokes (RANS) equations. The performance of the scheme is demonstrated by solving a well-known test-case consisting of an abrupt axisymmetric expansion using various degrees of polynomial approximation. Computations with k-ω model are performed to assess the modelling capabilities, with high-order accurate DG discretizations of the RANS equations, in presence of non-equilibrium flow conditions. © 2013 The Authors.
High-order Discontinuous Galerkin solutions of internal low-Mach number turbulent flows / Covello, V.; Nigro, A.; De Bartolo, C.; Florio, G.. - In: ENERGY PROCEDIA. - ISSN 1876-6102. - ELETTRONICO. - 45:(2014), pp. 528-537. (Intervento presentato al convegno 68th Conference of the Italian Thermal Machines Engineering Association, ATI 2013 tenutosi a Bologna, ita nel 2013) [10.1016/j.egypro.2014.01.057].
High-order Discontinuous Galerkin solutions of internal low-Mach number turbulent flows
Nigro A.;
2014-01-01
Abstract
In this work we apply the high-order Discontinuous Galerkin (DG) finite element method to internal low-Mach number turbulent flows. The method here presented is designed to improve the performance of the solution in the incompressible limit using an implicit scheme for the temporal integration of the compressible Reynolds Averaged Navier Stokes (RANS) equations. The performance of the scheme is demonstrated by solving a well-known test-case consisting of an abrupt axisymmetric expansion using various degrees of polynomial approximation. Computations with k-ω model are performed to assess the modelling capabilities, with high-order accurate DG discretizations of the RANS equations, in presence of non-equilibrium flow conditions. © 2013 The Authors.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
