GUST Version 2 Features

Basic Features

• Time dependent 3-D, Navier-Stokes and Euler equations
• Unstructured, fully conservative, cell-centered, upwind, finite-volume code
  -- 3-D, 2-D, axi-symmetric
  -- Supports any convex hulled polyhedra with convex faces; in particular
  Bricks (structured/multizone)
  Tetrahedra
  Triangles
  Hybrid (e.g., tetrahedra and prisms)
  -- Multizone

Chemistry

• Finite rate, frozen and equlibrum chemistry
• Species and Reaction databases for thermochemical properties
  -- Stand-alone database manager consistent with GASP

Thermodynamic and Transport Properties

• Equilibrium and non-equilibrium (U.S. only) thermodynamics models
• NASA LeRC extended curve fit option

Turbulence Models

• Wilcox k-omega two equation model
• Spalart-Allmaras one equation model
• Wall functions
• Coupled or uncoupled time integration

Parallel Computing

• Partition for parallel single zone execution
• Multizone parallelization
• Multizone with partitioning parallelization
• Implicit time integration across partition boundaries

Time Integration

• Explicit and implicit time integration of primitive variables
• Euler implicit with symmetric Gauss-Seidel inner iterations
• Euler implicit with Jacobi inner iterations
• Euler implicit with GMRes inner iterations
• Euler implicit with level Gauss-Seidel (vector machines)

Mesh Sequencing and Multi-Grid

• Sequencing of user supplied grid levels
• Solution files contain solutions on all grids for convergence studies

Fluxes and Jacobians

• Roe, Van Leer, and AUSM+ flux splittings
• Approximate Roe and AUSM+ linearization, complete Van Leer linearization

Boundary Conditions

• User-selectable list of boundary conditions
• Implicit boundary conditions

Post-Processing

• Support is provided for FIELDVIEW, EnSight, Tecplot, Visual3 and ViGPLOT
• Integrated quantities (e.g., lift and drag)
• Cutting planes
• Output in English or SI units

Graphical User Interface

• Based on OSF/Motif widget set
• Thermochemical database GUI
  -- Add new models by picking from list of species and reactions
  -- Search engine for finding species and reactions quickly
• GUST input and file management GUI
  -- Constructs syntactically correct input
  -- Constructs GUST grid files from various grid generators (including files in Plot3D format)
  -- Displays and computes a variety of freestream quantities for matching problem's flow conditions

Geometric Pre-Processor

• Read in all supported surfaces and curves
• Graphically display surfaces and curves
• Identify which curves intersect which surfaces
• Visualize orientation of curves and surfaces modify connectivity
• Set up grid distribution parameters from input curves and surfaces
• Output grid generation input decks

Grid Generation

• Advancing front/hybrid hyperbolic for viscous simulation
• Hybrid-multizone in 2 and 3 dimensions
• Support for NURBS surfaces and curves
• Control of grid smoothing (Delauney and spring analogy)

Miscellaneous

• Grid and Restart files use machine independent binary file format
• Space marching for supersonic flow

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