root = c25d-pow-plume-study-visc-tet-[plume resolution]:

Three meshes for the 25D powerered nacelle test cases that have
high-quality meshing for sonic boom analyses.  The meshes have a
refined near body mesh with viscous spacing that produces a Y+ of 1
(initial viscous spacing is 0.00001 m) and a Mach cone aligned outer
volume grid. The meshes around the body are essentially the same for
each of the three meshes, but differ in the plume region.  The plume
region contains a "baffle" surface. This is the only mechanism
available in Pointwise to cluster off body points in a volume mesh.
Beta-CAE ANSA surface mesher was used for the surface grid and
Pointwise volume mesher was used. Grids provided by Susan Cliff of
NASA Ames. These purely-tetrahedral grids are in full scale meters and
are intended for 0 deg angle of attack, Mach 1.60. See the README three
levels up for details.

The plume resolution descriptors for the grids are:
00001baf same spacing as the body upstream
01baf    0.01 m spacing in the plume region
multibaf transitions from 0.00001 m to 0.01 m over 4 baffle regions

description     nodes    tris      tets
00001baf     23603132 2037598 138682615
01baf        24647501 1977878 145058957
multibaf     23990407 2011410 141053605

The solutions on these three grids with FUN3D show little difference
upstream of the plume and notable difference in the plume signatures.

The grid files contain 7 boundary patches:
- patch 1 is the aircraft outer mold line
- patch 2 is y-symmetry
- patch 3 is inflow
- patch 4 is outflow
- patch 5 is a far field boundary
- patch 6 is the interface between the engine inlet and engine fan
- patch 7 is the interface between the engine exhaust and nozzle plenum

[root].b8.ugrid
[root].mapbc

real*8 data big endian C binary (FORTRAN stream) form of AFLR3 ugrid

[root].cgns

http://cgns.sourceforge.net/ version 3.3.0 format