•Inflation layers
–To better simulate boundary layer effects
–Mesh orthogonal to surface
with faces perpendicular to boundary layer flow direction
•Procedure
–Set Global Prism Parameters
–Select Parts to grow
layers from
•Typically wall
boundaries
–Set Local Parameters for each part
•Local overrides global
•Zero or blank entries
will defer
to global settings
–Run mesher
•From existing mesh
–Extrude into tetra/hexa mesh
–Extrude from surface tri mesh, then fill volumes
Run automatically
during Volume
Mesh creation
•Global Prism Parameters
–Growth law
•exponential: height = h(r)(n-1)
[n is layer #]
•linear: height = h(1+(n-1)(r-1))
–Initial height
of first layer – h in formulae above
•Auto calculated if not specified
–Based on factor
of edge length of base triangle/quad
–Height
determined so that top layer volume is slightly less than that of tetra/hex
just above it
–Number of
layers n
–Height ratio r
–Total height of all layers
–Usually specify
3 of the above 4 parameters
•Compute params will calculate the remaining parameter (total height usually left
blank)
–Or specify only Height ratio and Number of layers for auto
calculation of initial height
–These are the
defaults. Individual surface/curve
height/ratio/layers will override these defaults if set
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