root = biconvex-visc-adapt-[100*spacing]:

Submitting this adapted grid case is optional.

These purely-tetrahedral grids are in wind tunnel inches and are
intended for 0 deg angle of attack, Mach 1.60, and have been adapted
by refine to control Mach number interpolation erro with FUN3D-FV 13.5
with the multiscale metric Lp=2, mixed-space gradation.  See the
README two levels up for details. They were created by Mike Park

The grid files contain 52 boundary patches:
- patch 1 is inflow
- patch 6 is outflow
- patches 3-5 are the far field boundaries
- patch 2 and 40 are y-symmetry
- patch 46 is the propulsion inflow total pressure total temperature
- patches 7-39, 41-45, and 47-52 are the wind tunnel model

scale     nodes tetrahedra
2.00    1361683    7417124
1.60    2577519   14181582
1.28    5018367   27760738
1.00    9911355   54976190
0.80   19644767  109114171
0.64   39047343  217000924

[root].lb8.ugrid
[root].mapbc

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

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

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

[root].meshb

https://github.com/LoicMarechal/libMeshb Gamma Mesh Format (GMF)