GUST Version 2.0

GUST is AeroSoft's unstructured counterpart to the structured flow solver GASP. GUST is an unstructured, finite-volume formulation which solves the Reynolds averaged Navier-Stokes equations. The majority of physical-modeling capabilities currently distributed with AeroSoft's structured package, GASP, are also supported in this unstructured package. Both the structured and unstructured packages share a common library of routines used to calculate such quantities as thermodynamic and transport properties, inviscid fluxes, and source terms for the finite-rate chemical reactions. The unstructured fluid dynamics code currently is capable of accurately simulating time-dependent problems whose domain can be described with a single grid and single connectivity array. For example, the code is capable of simulating the trajectory of a falling store or oscillating airfoil. The unstructured code is also optimized for vectorization on Cray supercomputers and parallelization via domain decomposition on distributed memory multiprocessor architectures.

In addition to the flow solver, members of AeroSoft have developed two-dimensional and three-dimensional grid generators based upon the advancing-front algorithm. An additional step assures that the resulting mesh qualifies as a Delauney triangulation. Starting at the computational boundaries, the advancing-front algorithm introduces nodes and cells, one at a time, until the entire domain is discretized. This algorithm benefits by generating the nodes and connectivity information simultaneously. In addition, the grid-point distribution and cell orientation are completely arbitrary making the generalized-discretization approach ideal for solution adaptation.

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