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Grids (no plenum) - 2D NASA Wall-Mounted Hump Separated Flow Validation Case

Five grids are supplied on this page for the NASA wall-mounted hump case. These are grids with no plenum. Compare to the Grids from the CFDVAL2004 Workshop (including plenum). These grids include a contoured upper wall (to approximately account for side-plate blockage). The finest grid contains 1633 points streamwise and 433 points normal, for a total of approximately 707,000 points. Coarser grids are created by removing every other point in each coordinate direction, down to the coarsest 103 x 28 grid. The finest grid has minimum spacing at the wall of approximately y=4 x 10^-6, giving an approximate average y+ of about 0.1 at the Reynolds number run. The grid is stretched in the wall-normal direction, and the grid spacing at the upper wall assumes usage of a slip-wall BC there. The figures below show two views of the 409 x 109 version of 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 grids (two identical x-z planes, separated by a distance y=1, giving one spanwise cell for all grid levels). You may use whichever is more convenient for your particular application.

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) 1633x433 grid (705,024 cells) (gzipped) (8.7 MB)
• (2-D) 817x217 grid (176,256 cells) (gzipped) (2.1 MB)
• (2-D) 409x109 grid (44,064 cells) (gzipped) (< 1 MB)
• (2-D) 205x55 grid (11,016 cells) (gzipped) (< 1 MB)
• (2-D) 103x28 grid (2,754 cells) (gzipped) (< 1 MB)

Format for the 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) 2x1633x433 grid (705,024 cells) (gzipped) (11.4 MB)
• (3-D) 2x817x217 grid (176,256 cells) (gzipped) (2.9 MB)
• (3-D) 2x409x109 grid (44,064 cells) (gzipped) (< 1 MB)
• (3-D) 2x205x55 grid (11,016 cells) (gzipped) (< 1 MB)
• (3-D) 2x103x28 grid (2,754 cells) (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):

• Neutral Map File for (3-D) 2x1633x433 grid
• Neutral Map File for (3-D) 2x817x217 grid
• Neutral Map File for (3-D) 2x409x109 grid
• Neutral Map File for (3-D) 2x205x55 grid
• Neutral Map File for (3-D) 2x103x28 grid

CGNS Files

The structured grids are also available as CGNS files (3-D versions only, with two identical x-z planes, separated by a distance y=1, giving one spanwise cell for all grid levels). Note that the BCs written inside the CGNS files are for guidance only, and may not reflect the appropriate BCs needed for your application. To read/write CGNS files, (free) software may be necessary if your pre/post-processing tools do not already handle it. See: CGNS Website for details.

Download the 3-D version of the grids in CGNS format (gzipped) here:

• (3-D) 2x1633x433 CGNS struct grid (705,024 cells) (gzipped) (7.9 MB)
• (3-D) 2x817x217 CGNS struct grid (176,256 cells) (gzipped) (2.0 MB)
• (3-D) 2x409x109 CGNS struct grid (44,064 cells) (gzipped) (< 1 MB)
• (3-D) 2x205x55 CGNS struct grid (11,016 cells) (gzipped) (< 1 MB)
• (3-D) 2x103x28 CGNS struct grid (2,754 cells) (gzipped) (< 1 MB)

UNSTRUCTURED VERSIONS OF GRIDS

CGNS and AFLR3 Files

The unstructured versions of the same grids are all given as CGNS and AFLR3 (UGRID) files. Note that the BCs written inside the CGNS files are for guidance only, and may not reflect the appropriate BCs needed for your application. To read/write CGNS files, (free) software may be necessary if your pre/post-processing tools do not already handle it. See: CGNS Website for details.

The unstructured grids are all given as 3-D grids (two identical x-z planes, separated by a distance y=1, giving one spanwise cell for all grid levels). They are given as hexahedra (quadrilaterals in the x-z plane).

Download the unstructured CGNS grids (gzipped) as 3-D hexahedra (quadrilaterals in x-z plane) here:

• (3-D) 2x1633x433 CGNS unstruct grid (705,024 cells) (gzipped) (29.2 MB)
• (3-D) 2x817x217 CGNS unstruct grid (176,256 cells) (gzipped) (7.2 MB)
• (3-D) 2x409x109 CGNS unstruct grid (44,064 cells) (gzipped) (1.8 MB)
• (3-D) 2x205x55 CGNS unstruct grid (11,016 cells) (gzipped) (< 1 MB)
• (3-D) 2x103x28 CGNS unstruct grid (2,754 cells) (gzipped) (< 1 MB)

Download the unstructured AFLR3 grids (gzipped) as 3-D hexahedra (quadrilaterals in x-z plane) here:

• (3-D) 2x1633x433 AFLR3 unstruct grid (705,024 cells) (gzipped) (33.0 MB)
• (3-D) 2x817x217 AFLR3 unstruct grid (176,256 cells) (gzipped) (8.3 MB)
• (3-D) 2x409x109 AFLR3 unstruct grid (44,064 cells) (gzipped) (2.0 MB)
• (3-D) 2x205x55 AFLR3 unstruct grid (11,016 cells) (gzipped) (< 1 MB)
• (3-D) 2x103x28 AFLR3 unstruct grid (2,754 cells) (gzipped) (< 1 MB)

Return to: 2D NASA Wall-Mounted Hump Separated Flow Validation Case Intro Page

Return to: Turbulence Modeling Resource Home Page

Recent significant updates:
10/02/2023 - added AFLR3 (UGRID) versions of unstructured grids

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Responsible NASA Official: Ethan Vogel
Page Curator: Clark Pederson
Last Updated: 04/20/2024