Convergence Acceleration of the CFD Code Edge by LU-SGS
2011 (English)In: 3rd CEAS European Air & Space Conference, Venice, 24-28 October 2011, CEAS/AIDAA , 2011, 606-611 p.Conference paper (Refereed)
Edge is a flow solver for unstructured grids based on a dual grid and edge-based formulation. The standard dual-time stepping methods for compressible unsteady flows are inadequate for large-scale industrial problems. This has motivated the present work, in which an implicit Lower-Upper Symmetric Gauss-Seidel (LU-SGS) type of relaxation has been implemented in the code Edge with multigrid acceleration. Two different types of dissipation, a scalar and a matrix model, have been constructed which increase the diagonal dominance of the system matrix but not the numerical viscosity of the computed solution. A parametric study demonstrates convergence accelerations by a factor of three for inviscid transonic flows compared to explicit Runge-Kutta smoothing for multigrid acceleration.
Place, publisher, year, edition, pages
CEAS/AIDAA , 2011. 606-611 p.
compressible CFD, convergence acceleration, implicit time-stepping, matrix dissipation
IdentifiersURN: urn:nbn:se:kth:diva-78943OAI: oai:DiVA.org:kth-78943DiVA: diva2:493047
3rd CEAS European Air & Space Conference
QC 201202092012-02-092012-02-082014-12-01Bibliographically approved