ICEM CFD Meshes for Drag Prediction Workshop Structured Multiblock Meshes for WB & WBNP...
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Transcript of ICEM CFD Meshes for Drag Prediction Workshop Structured Multiblock Meshes for WB & WBNP...
ICEM CFD Meshes for Drag Prediction Workshop
• Structured Multiblock Meshes for WB & WBNP configuration
• Unstructured Tetra + Prism Meshes• Three unstructured meshes for each
configuration based on size of the mesh• Prisms & Pyramids can be readily
converted into tetras for solvers that can not handle prism & pyramid elements
Files
• ICEM CFD files, Plot3D files and CGNS files are available
• CGNS files are written by ICEM CFD CGNS translator using CGNS library version 2.1
• Plot3D files are written with Double precision, Formatted, no IBLANK array with ‘Whole’ data layout.
• Contact [email protected] for different format of the mesh
• Wing-body configuration mesh files contains “wb” in the name, Wing-Body-Nacelle-Pylon configuration mesh files contains “wbnp”
Wing-Body Hex Mesh
• C – Topology around the wing • Fine, Medium and Coarse grids are available• 4 Levels of Multigrid (level 0, 1, 2 & 3) – Coarse
mesh has only 3 levels (level 0, 1 & 2) of Multigrid
• Viscous Grid with Near wall Spacing = 0.001
Wing-Body Hex Mesh C – Topology for wing
• 10 Million Hexas
Fine Mesh Medium Mesh
• 5.5 Million Hexas
• 3.3 Million Hexas
Coarse Mesh
Wing-Body-Nacelle-Pylon Hex Mesh
• C – Topology for Wing-Nacelle-Pylon region.
• 4 Levels of Multigrid (level 0, 1, 2 & 3) for fine and medium meshes and 3 levels of multigrid (level 0, 1 & 2) for coarse configuration
• Minimum number of blocks• Viscous Grid With Near Wall Spacing =
0.001
Wing-Body-Nacelle-Pylon C – Topology for Nacelle & Wing
• 13.7 Million Nodes (13.5M Hexas)
• 4.6 Million Nodes (4.5M Hexas)
Fine Mesh
• 8.5 Million Nodes (8.3M Hexas)
Coarse Mesh
Medium Mesh
Wing-Body Tetra Prism Mesh - Coarse
• Total Number of Tetras – 1.2 million
Prisms – 0.8 millionNodes – .62 million
• 10 Layers of Prisms• First prism layer height
from surface = 0.05mm
• File name aiaa_wb_prism_2.0m*
Wing-Body Tetra Prism Mesh - Medium
• Total Number of Tetras – 1.5 million
Prisms – 3.8 millionNodes – 2.2 million
• 35 Layers of Prisms• First prism layer height
from surface = 0.001mm• File name
aiaa_wb_prism_5.2m*
Wing-Body Tetra Prism Mesh - Fine
• Total Number of Tetras – 4.2 million
Prisms – 9.75 millionNodes – 5.7 million
• 40 Layers of Prisms• First prism layer height
from surface = 0.001mm• File name aiaa_wb_14.0m*
Wing-Body Tetra Prism Mesh With Elongated Triangles at Leading and Trailing Edges
• Total Number of Tetras –million
Prisms –millionNodes –million
• 35 Layers of Prisms• First prism layer height
from surface = 0.001mm
• File name aiaa_wbe*
Wing-Body-Nacelle-Pylon Tetra Prism Mesh - coarse
• Total Number of Tetras – 1.25
millionPrisms – 1.7
millionNodes – 1.1
million• 10 Layers of Prisms• First prism layer height
from surface = 0.05mm• File name
aiaa_wbnp_3.0m*
Wing-Body-Nacelle-Pylon Tetra Prism Mesh - Medium
• Total Number of Tetras – 0.8 million
Prisms – 4.25 million
Nodes – 2.3 million• 35 Layers of Prisms• First prism layer height
from surface = 0.001 mm• File name
aiaa_wbnp_5.om*
Wing-Body-Nacelle-Pylon Tetra Prism Mesh - Fine
• Total Number of Tetras – 3.0
millionPrisms – 10.6
millionNodes – 5.9 million
• 39 Layers of Prisms• First prism layer height
from surface = 0.001 mm• File name
aiaa_wbnp_14.0m*
Wing-Body-Nacelle-Pylon Tetra Prism Mesh With Elongated Triangles at Leading and Trailing Edges• Total Number of Tetras – 2.5
millionPrisms – 5.5
millionNodes – 3 million
• 39 Layers of Prisms• First prism layer
height from surface = 0.001 mm
• File name aiaa_wbnpe*