SETZETA Version 2.1

Author: William Chan

Description:

Program to generate file `zetavar.i' containing variable far field distance, variable initial/end spacing for input to HYPGEN. The variable end spacing is activated in HYPGEN only if hyperbolic tangent stretching is selected. The surface grid surf.i is accessed to obtain jmax,kmax.

Input:

The program prompts for the following input: 
     ifar = 0  do not prompt for a variable far field distance
          = 1  constant far field distance
          = 2  piece-wise linear 1-D function in J and K respectively,
               distance specified at nodes.
          = 3  compute distance to centroid in J or K stations,
               good for internal grids.
          = 4  transfinite interpolation in J and K, distance specified
               at nodes on the four boundaries
          = 10 read in bilinear surface and do shooting (to be implemented
               in future)

     idzs = 0  do not prompt for a variable initial grid spacing
          = 1  constant initial grid spacing
          = 2  piece-wise linear 1-D function in J and K respectively,
               spacing specified at nodes.
          = 4  transfinite interpolation in J and K, distance specified
               at nodes on the four boundaries.
          = 10 read in volume grid and use final spacing in L as initial
               spacing (jmax and kmax must match of course).

     idze = 0  do not prompt for a variable end grid spacing
          = 1  constant end grid spacing
          = 2  piece-wise linear 1-D function in J and K respectively,
               spacing specified at nodes.
          = 4  transfinite interpolation in J and K, distance specified
               at nodes on the four boundaries

     zeta(j,k,1) - variable far field distance
     zeta(j,k,2) - variable initial spacing
     zeta(j,k,3) - variable end spacing

File formats

The input file format is detected by the code automatically. This includes: 
     Ascii/Unformatted.
     Little/Big Endian for unformatted files.
     Single/Double precision for unformatted files.
     Single/Multiple grid file.
     2D/3D.
Only files with 1 grid are processed. Output file format follows the endian and precision of the input file.
Last modified: Mon Nov 17 13:34:00 PST 2025