ISAAC is a cfd code which can be found in www.sourceforge.net

call cgx in the build mode:

  cgx -b ../rae2822.fbd

Then type (in the cgx-graphic window, not the xterm!)

  read isaac.fbl

The grid is the written.

Then combine the prepared input file-header with the block-structure:

  cat RAE2822.hdr isaac.dat >| RAE2822.dat

call isaac with the prepared input file:

  isaac < RAE2822.dat

Post-processing with:

  cgx -isaac2d RAE2822

