Prism Meshing–Workshop 2 Wingbody

“Bottom up” Volume Meshing

First, extrude prism mesh from standalone surface mesh

-“Bottom up” approach

-Could also extrude into existing volume mesh (traditional method), “top down” approach

Generate rest of grid

-Farfield volume

-Delauney

Use density region

-Define mesh size for refinement

-In area where no geometry exists

Create Hexa core

-For majority hex fill in far field

Choose File > Open Project

-To load previously saved surface mesh and geometry

-Browse to Wingbody working directory

-Load previous project

If previous project was not completed, load the geometry F6_complete.tin and the mesh f6_surf.uns

Global Prism Parameters

Set global prism parameters

-Mesh > Global Mesh Setup > Prism Meshing Parameters

-Set Growth law to exponential (default)

-Initial height = 0

Height determined automatically so that last prism is similar volume to adjacent tetra

Proportional to size of triangle

-Height ratio = 1.2

-Number of layers = 5

-New volume part = LIVE

.Scroll down to access

.We will create prism from a surface-only mesh

.The volume part is necessary when extruding from surface mesh

Pick Parts for Prism Mesh

Select Parts and Compute prism mesh

-Mesh > Compute Mesh > Prism Mesh

-Press Select Parts for Prism Layer

.FAIRING, FUSELAGE, WING

-Apply, then Dismiss

-Compute

Height, height ratio, and num layers were set globally

Display Mesh

Display Prism mesh

-Turn off FARFIELD

-Zoom in to view prism quad faces on symmetry plane

-Turn on Mesh > Volumes > Prisms in model tree

-There is no other volume mesh but prisms

Unstructured mesh, prism.uns is saved automatically to the working directory

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