International Journal of Mathematics and Computer Sciences (IJMCS) ISSN: 2305-7661 Vol.21 September 2013 International Scientific Researchers (ISR)

A novel high-order method, termed flux correction, previously formulated for inviscid flows, is extended to viscous flows on arbitrary triangular grids. The correction method involves the addition of truncation errorcanceling terms to the second-order linear Galerkin (node-centered finite volume) scheme to produce a thirdorder inviscid and fourth-order viscous scheme. The correction requires minimal modification of the underlying second-order scheme. As such, the method retains many of the advantages of traditional finite volume schemes, including robust shock capturing, low algorithmic complexity, and solver efficiency. In addition, we extend the scheme to unsteady flows. Verification and validation studies in two dimensions are presented. Significant improvement in accuracy is observed in all cases, with between 30–70 % increase in computational cost over a second-order finite volume method.