pointwise - kth · quilts: grid regions on geometry surfaces imported from cad quilts simplify,...
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PointwiseReliable CFD MeshingKTH-2017
Metacomp Technologies
Arnold Air Force Base
Ohio Northern Univ.
HYDAC USA
CRAFT Tech
Sinclair Knight Merz
Garry Rogers Motorsport
Structured
Unstructured
Hybrid
Native CAD
Plugin SDK
Glyph
Structured
Unstructured
Hybrid
Native CAD
Plugin SDK
Glyph
ACISCATIA V4CATIA V5
IGESNX
NastranPLOT3DParasolidPatran
Pro/EngineerSTEPSTL
SegmentSolidWorks
UCDUGRIDVRMLXpatch
…
Quilts: Grid Regions on GeometrySurfaces imported from CAD
Quilts simplify, capture features
Surface grids follow quilts
Sharp corners, transitions preserved in mesh
Defeaturing with Quilts
3 quilts (black, gray, green)Features inside quilt (green) approximated
Structured
Unstructured
Hybrid
Native CAD
Plugin SDK
Glyph
Structured
Unstructured
Hybrid
Plugin SDK
Native CAD
Glyph
Domain Algorithms and Cell Types
• Delaunay- Points recursively inserted
into domain to form triangles; Triangles combined for Triangles and Quadssetting.
• Advancing Front- Propagates layers of
equilateral triangles from boundaries into domain; Triangles combined for Triangles and Quads setting.
• Advancing Front Ortho- Right angle triangles
propagated from boundaries into domain; Triangles combined for Triangles and Quads setting.
Triangles Triangles and Quads
Delaunay
AdvancingFront
AdvancingFront Ortho
T-Rex Mixed Cell Domains
• This allows you to create the following combinations of domains:
- Triangular T-Rex cells with triangular isotropic cells (shown).
- Quad dominant T-Rex cells with triangular isotropic cells.
- Quad dominant T-Rex cells with quad dominant isotropic cells (shown).
Iso and T-Rex Triangles
Iso and T-Rex Quad Dominant
AdvancingFront Ortho
AdvancingFront
Delaunay
Anisotropic Refinement
Isotropic Refinement
Anisotropic: 6,300 cells
Isotropic: 34,000 cells
Structured
Unstructured
Hybrid
Plugin SDK
Native CAD
Glyph
Structured
Unstructured
Hybrid
Plugin SDK
Native CAD
Glyph
FDNS/UNICFieldViewFrontFlow
GASPINCA V2Kestrel
NASTRANNCC
NPARCNSAERONSU3D
OpenFOAMOverflowPATRAN
PHOENICSPLOT3DSCRYU
SC/TetraShipIR
SplitflowSTAR-CCM+
STAR-CDSTLSU2
TACOMATASCflow
TEAMTecplotTETREX
UCDUGRIDVRML
USM3DVSAEROWIND
WIND-USXPATCH
Plugins…
AcuSolveADPAC
ANSYS CFX
ANSYS FLUENTCFD++
CFDShip-Iowa
CFL3DCGNSCNSFVCobaltCOMO
CRUNCHDTNS
Exodus IIEdge
FALCONFANS
Structured
Unstructured
Hybrid
Overset
Native CAD
Plugin SDK
Glyph