Flow Solver Algorithms and Data Structures for TAUijk

Abstract

At the DLR Institute of Aerodynamics and Flow technology two different types of CFD codes dedicated to aerodynamic applications have been developed. These are the block-structured FLOWer-code and the unstructured TAU-code. Currently the TAU-code is extended by structured algorithms to the TAUijk-Code in order to combine the advantages of both codes. Within this report structured algorithms of the TAUijk-code are compared with the corresponding unstructured algorithms of the TAU-code. In particular these are the dissipation scheme in the case of a central discretization scheme, implicit residual smoothing algorithms and in the context of the multigrid scheme a structured first-order interpolation scheme for the prolongation operator. Additionally the extension of the TAU data structure that is required to implement structured algorithms are described.