PHOTON USE
  p
 
 
 
 
   0.20443E+04 0.15633E+04 CR
  set title off
  red
  text
 
 
  Backward facing step with the preconditioning CG solver.
   0.35366E+03 0.12376E+03 CR
  use patgeo
  vec z 1 sh
  @
   0.10125E+04 0.12246E+04 CR
  Velocity vectors.@
  @
   0.11215E+04 0.65787E+03  @
  Press RETURN to continue.@
  pause
  vec cl
  red
  con p1 z 1 fill;0.01
  @
   0.10382E+04 0.12246E+04 CR
  Pressure contours.@
  @
   0.14483E+04 0.65136E+03 CR
  Press RETURN to continue.@
  pause
  con cl
  red
  str 2d z 1 sh
  int 30
  @
   0.91000E+03 0.12636E+04 CR
  Streamlines@
  @
   0.13201E+04 0.64484E+03 CR
  Press RETURN to end@
  pause
  end
  ENDUSE
 
    GROUP 1. Run title and other preliminaries
L(290)
TEXT(CORE CASE 290 WITH JACD SOLVER     :N206
TITLE
  DISPLAY
  ** Phoenics core library case 290 with the multi-step Jacobi
     preconditioning conjugate gradient solver (JACG)
  ** Information required to use this solver is:
     1. CSG3=JACD to specify the name of the solver.
     2. ICNGRB <= phi <= ICNGRC to specify which phis to solve for,
        all phis in this range will be solved, though P1,U1,V1,W1
        are also solved by default.
     3. NFUSER=19*NX*NY*NZ for workspace.
     4. USEGRX=T;USOLVE=T to ensure that it is called from grex.
     5. IG(12)=2 to set the number of Jacobi steps
  ENDDIS
 
    GROUP 19. Data communicated by satellite to GROUND
    ** Pass the information for the required solver:
CSG3=JACD
ICNGRB=12;ICNGRC=13
NFUSER=19*NX*NY*NZ
USEGRX=T;USOLVE=T
IG(12)=2
    GROUP 24. Dumps for restarts
TSTSWP=-1