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The software’s T-Rex (anisotropic tetrahedral extrusion) technique generates layers of hexahedra or prisms near the geometry model for boundary layer resolution. Use of regular hexahedra elsewhere in the mesh can improve the CFD flow solver’s rate of convergence and accuracy of the resulting solution. An added benefit is a potential reduction in overall cell count.
“Voxel mesh capabilities were originally implemented in Pointwise as part of research for the U.S. Air Force related to overset grid assembly,” said Dr. John Steinbrenner, executive vice president. “We have extended voxels beyond their original intent into hex-core: an efficient, space-filling meshing technique that delivers a lot of attributes that should benefit flow solvers.”
This flow solution at freestream Mach number of 0.85 for NASA's Common Research Model was computed by CRAFT Tech using their CRUNCH CFD solver on a hex-core mesh from Pointwise V18.3. The flow is colored by Mach number. Image created in Ensight 10.2.
Jeremy Shipman from CRAFT Tech was an early beta tester of Pointwise’s new hex-core capability and computed a solution for NASA’s Common Research Model using their CRUNCH flow solver. “The ability to couple a voxel farfield topology automatically with a near-body T-Rex mesh offers the user a robust and flexible new approach for generating efficient hexahedral cell topologies within complex unstructured meshes,” said Shipman. “The fact that this feature works with the standard methods for controlling resolution such as sources and decay parameters makes this a powerful new feature.”
Pointwise V18.3 can be downloaded from https://ptwi.se/2Nj0ank.
CRAFT Tech's specialty is the high-fidelity computational simulation of complex fluid dynamic and combustive problems on large-scale, parallel architecture computers. Technology sectors supported by CRAFT Tech include missiles, aircraft/rotorcraft, propulsion/turbomachinery, weapon systems and effects, and industrial problems. They also perform fundamental research in CFD, grid adaptation, aeroacoustics, turbulence, combustion, and multi-phase flow. crunch.craft-tech.com
Pointwise, Inc. is solving the top problem facing computational fluid dynamics (CFD) today – reliably generating high-fidelity meshes. The company's Pointwise software generates structured, unstructured, overset and hybrid meshes; interfaces with CFD solvers such as ANSYS FLUENT®, STAR-CCM+®, OpenFOAM®, and SU2 as well as many neutral formats, such as CGNS; runs on Windows, Linux, and Mac, and has a scripting language, Glyph, that can automate CFD meshing. Manufacturing firms and research organizations worldwide have relied on Pointwise as their complete CFD preprocessing solution since 1994.
Pointwise is a registered trademark of Pointwise, Inc. in the USA and the EU. Pointwise Glyph, T-Rex and Let's Talk Meshing are trademarks of Pointwise, Inc. All other trademarks are property of their respective owner.
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