Discontinuous Galerkin methods are very well suited for the construction of very high-order approximations of the Euler and Navier–Stokes equations on unstructured and possibly nonconforming grids but are rather demanding in terms of computational resources. In order to improve their computational efficiency, a p-multigrid solution strategy is here considered for the solution of the Navier–Stokes equations. In particular, a line smoother will be used to alleviate the effect of stretched grids on the convergence rate. The effectiveness and efficiency of the proposed approach in the solution of compressible shockless flow problems is demonstrated on the following 3D viscous test cases: a Delta Wing and a 3D streamlined body.

Efficient p-multigrid discontinuous Galerkin solver for complex viscous flows on stretched grids

COLOMBO, Alessandro;BASSI, Francesco;
2014-01-01

Abstract

Discontinuous Galerkin methods are very well suited for the construction of very high-order approximations of the Euler and Navier–Stokes equations on unstructured and possibly nonconforming grids but are rather demanding in terms of computational resources. In order to improve their computational efficiency, a p-multigrid solution strategy is here considered for the solution of the Navier–Stokes equations. In particular, a line smoother will be used to alleviate the effect of stretched grids on the convergence rate. The effectiveness and efficiency of the proposed approach in the solution of compressible shockless flow problems is demonstrated on the following 3D viscous test cases: a Delta Wing and a 3D streamlined body.
journal article - articolo
2014
Ghidoni, Antonio; Colombo, Alessandro; Bassi, Francesco; Rebay, Stefano
File allegato/i alla scheda:
File Dimensione del file Formato  
Colombo - Efficient p-multigrid discontinuous Galerkin solver.pdf

Solo gestori di archivio

Versione: publisher's version - versione editoriale
Licenza: Licenza default Aisberg
Dimensione del file 3.27 MB
Formato Adobe PDF
3.27 MB Adobe PDF   Visualizza/Apri
Pubblicazioni consigliate

Aisberg ©2008 Servizi bibliotecari, Università degli studi di Bergamo | Terms of use/Condizioni di utilizzo

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/51642
Citazioni
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 9
social impact