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Turbulence Modeling Resource

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Grids - Axisymmetric Cold Supersonic Jet Case

Note that these grids are identical to the grids for the Axisymmetric Hot Supersonic Jet Case. 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 diameter (i.e., D_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 481x161; 81x121; 401x345 to the coarsest 61x21; 11x16; 51x44 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 axisymmetric supersonic Seiner et al grid

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

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 5 deg from each other; one plane on the y=0 axis and one rotated 5 deg from the x-z plane). 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 the 2-D version of the grids in PLOT3D format here:

(2-D) 481x161; 81x121; 401x345 (gzipped) (1.4 MB)
(2-D) 241x81; 41x61; 201x173 (gzipped) (< 1 MB)
(2-D) 121x41; 21x31; 101x87 (gzipped) (< 1 MB)
(2-D) 61x21; 11x16; 51x44 (gzipped) (< 1 MB)

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 the 3-D version of the grids in PLOT3D format here:

(3-D) 2x481x161; 2x81x121; 2x401x345 (gzipped) (4.3 MB)
(3-D) 2x241x81; 2x41x61; 2x201x173 (gzipped) (< 1 MB)
(3-D) 2x121x41; 2x21x31; 2x101x87 (gzipped) (< 1 MB)
(3-D) 2x61x21; 2x11x16; 2x51x44 (gzipped) (< 1 MB)

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):

Return to: Axisymmetric Hot Supersonic Jet Case Intro Page

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Recent significant updates:
08/27/2018 - repaired pointers to 3-D version of grids

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Responsible NASA Official: Ethan Vogel
Page Curator: Clark Pederson
Last Updated: 05/13/2019