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Grids - Mach 1.63 Axisymmetric Jet

Note that these grids are identical for the 3 cases of Temperature-Matched Mach 1.63 Axisymmetric Jet, Heated Mach 1.63 Axisymmetric Jet, and Off-Design Mach 1.63 Axisymmetric Jet.

A series of 4 nested grids are provided. Each is made up of 3 zones. Each grid has been scaled relative to the jet exit radius (i.e., r_jet=1). All grid files have been gzipped. Each coarser grid is exactly every-other-point of the next finer grid, ranging from the finest 401x281; 201x161; 961x481 to the coarsest 51x36; 26x21; 121x61 grid. The following figure shows the finest grid. Note that the jet exit is at x=0, at the boundary of zones 1 and 3.
view of Mach 1.63 axisymmetric grid zoomed in view of Mach 1.63 axisymmetric grid

Note: be sure to use double precision when reading the grids!

All grid files below can be downloaded together in one zip file: Jet_mach1p63_grids.zip

STRUCTURED VERSIONS OF GRIDS

PLOT3D Files

The structured PLOT3D grids are given in two different ways, as 2-D grids (x-y plane) or as 3-D axisymmetric grids (two planes rotated through 1 deg from each other. You may use whichever is more convenient for your particular application. If you get the 2-D grid version, then you must create an axisymmetric grid from it on your own.

Format for the structured 2D grids is PLOT3D-type, formatted, MG, 2D (nbl=1) - note that you must use double precision when reading! :

      read(2,*) nbl
      read(2,*) (idim(n),jdim(n),n=1,nbl)
      do n=1,nbl
        read(2,*) ((x(i,j,n),i=1,idim(n)),j=1,jdim(n)),
     +            ((y(i,j,n),i=1,idim(n)),j=1,jdim(n))
      enddo

Download all grids in one zip file above. The 2-D version of the grids in PLOT3D format are:

mach_163_fine.p2dfmt.x.gz: (2-D) 401x281; 201x161; 961x481
mach_163_medium.p2dfmt.x.gz: (2-D) 201x141; 101x81; 481x241
mach_163_coarse.p2dfmt.x.gz: (2-D) 101x71; 51x41; 241x121
mach_163_xcoarse.p2dfmt.x.gz: (2-D) 51x36; 26x21; 121x61

Format for the 2-rotated-plane structured 3D grid is PLOT3D-type, formatted, MG, 3D (nbl=1, and idim in this case is 2) - note that you must use double precision when reading! :

      read(2,*) nbl
      read(2,*) (idim(n),jdim(n),kdim(n),n=1,nbl)
      do n=1,nbl
        read(2,*) (((x(i,j,k,n),i=1,idim(n)),j=1,jdim(n)),k=1,kdim(n)),
     +            (((y(i,j,k,n),i=1,idim(n)),j=1,jdim(n)),k=1,kdim(n)),
     +            (((z(i,j,k,n),i=1,idim(n)),j=1,jdim(n)),k=1,kdim(n))
      enddo

Download all grids in one zip file above. The 3-D version of the grids in PLOT3D format are:

mach_163_axi_fine.p3dfmt.x.gz: (3-D) 2x401x281; 2x201x161; 2x961x481
mach_163_axi_medium.p3dfmt.x.gz: (3-D) 2x201x141; 2x101x81; 2x481x241
mach_163_axi_coarse.p3dfmt.x.gz: (3-D) 2x101x71; 2x51x41; 2x241x121
mach_163_axi_xcoarse.p3dfmt.x.gz: (3-D) 2x51x36; 2x26x21; 2x121x61

If desired, example Neutral Map Files associated with 3-D version of the grids are given here (these files specify grid indices associated with each boundary condition - see The Neutral Map File):

UNSTRUCTURED VERSIONS OF GRIDS

AFLR3 Files

The unstructured versions of the same grids are all given as AFLR3 (UGRID) files. Download all grids in one zip file above. The unstructured AFLR3 grids as (mostly) 3-D hexahedra (quadrilaterals in x-z plane) are:

mach_163_axi_fine.b8.ugrid.gz: (3-D) AFLR3 unstruct grid (1,212,321 nodes, 604,800 cells)
mach_163_axi_med.b8.ugrid.gz: (3-D) AFLR3 unstruct grid (304,664 nodes, 151,200 cells)
mach_163_axi_coarse.b8.ugrid.gz: (3-D) AFLR3 unstruct grid (76,734 nodes, 37,800 cells)
mach_163_axi_xcoarse.b8.ugrid.gz: (3-D) AFLR3 unstruct grid (19,469 nodes, 9450 cells)

All AFLR3 grids have the same mapbc file: mach_163_axi_fine.b8.ugrid.

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Page Curators: Christopher Rumsey, Ethan Vogel, Clark Pederson
Last Updated: 04/16/2026