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Suggar++ Overset Grid Assembly Tool Now Available
Posted Thu January 05, 2012 @05:33PM
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News Celeritas Simulation Technology, LLC is proud to announce the availability of Suggar++ for licensing.

Suggar++ is the premier general purpose overset/chimera grid assembly software and is unique in its wide range of capabilities to support most all flow solvers and grid topologies.

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Suggar++ can be run as a pre-processor for static configurations or linked into the flow solver as a library to perform the overset Domain Connectivity Information (DCI) computations at each step of a time-dependent configuration.

A partial list of Suggar++ capabilities includes:

Produce the overset DCI for node- and/or cell-centered flow solvers for the following grid topologies:

  • Structured grids:
    • Cartesian
    • Curvilinear including block-to-block grids
  • Unstructured grids:
    • All tetrahedral
    • Mixed element (hexahedron, tetrahedron, prism/wedge, pyramid elements)
    • Octree-base Cartesian (cell-centered only)
    • General polyhedral elements will be supported in a future release
Suggar++ allows mixing of all the supported grid topologies and solver locations (node- and/or cell-centered) in a single run enabling the coupling of different flow solvers via overset communication. Structured grids can be used and output as unstructured hexahedral elements for use with unstructured flow solvers supporting mixed elements.

Suggar++ also supports structured and unstructured grid systems with overlapping surfaces. A surface assembly procedure, which effectively projects one grid onto another, is employed to obtain correct interpolations near the surfaces, which is critical for viscous grids. Panel weights for use in integrating surface force and moments on the overlapping surfaces are also available.

Suggar++ can execute in parallel using threads for shared memory/multi-core systems or using MPI for distributed memory systems.

Suggar++ has an internal grid refinement capability that can be used to refine an unstructured grid to improve the overlap and eliminate orphans. This capability can also be used to refine the grid to improve local resolution for flow solution adaption.

Suggar++ provides support for high-order flow solutions. An arbitrary number of fringe levels is allowed to support the expanded flow solver stencils required for high order spatial discretization. Suggar++ also provides high-order donor interpolation for node- or cell-centered structured grids.

Suggar++ is now available for licensing in the U.S and the world under an EAR-99 export license.

More information on Suggar++ is available at: Or contact us at

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