Dr. Ed Wilson, Univ. of California, Berkecly, 1965
Input Data for the Wilson Transient Heat Conduction Convection Code
   For 2-D and Axisymmetric T3 & Q4 Elements (and L2 boundaries)

1. Controls
  HED, NUMNP, NUMEL, NUMCBC, KAT, NUMMAT, NDT, INTER, DT

  HED    = 80 character title on one line
  NUMNP  = NUMBER OF NODAL POINTS
  NUMEL  = NUMBER OF ELEMENTS
  NUMCBC = NUMBER OF CONVECTION BC EDGES
  KAT    = KIND OF ANALYSIS TYPE
           = 0, TWO DIMENSIONAL PLANE BODY, else AXISYMMETRIC SOLID BODY
  NUMMAT = NUMBER OF MATERIALS
  NDT    = NUMBER OF TIME INCREMENTS
  INTER  = OUTPUT STEP INTERVAL
  DT     = TIME STEP SIZE

2. Material Properties, N = 1, NUMMAT
  M, XCOND (M), SPHT (M), DENS (M), QX (M)

  M      = MATERIAL NUMBER
  XCOND  = THERMAL CONDUCTIVITY
  SPHT   = SPECIFIC HEAT
  DENS   = MASS DENSITY
  QX     = HEAT GENERATION PER UNIT VOLUME

3.  Nodal Data, with gaps to be filled by linear interpolation
  N, KODE (N), X (N), Y (N), T (N)

  N      = NODE NUMBER
  KODE   = ESSENTIAL BOUNDARY CONDITION CODE
           = 0, NO ESSENTIAL BC, USE T AS INITIAL CONDITION
           = 1, USE T AS ESSENTIAL BC
  X      = X (OR RADIAL) COORDINATE
  Y      = Y (OR AXIAL) COORDINATE
  T      = ESSENTIAL BC, or INITIAL CONDITION TEMPERATURE

4.  Element Data, with gaps to be filled by linear interpolation
  NUM, KX(1), KX(2), KX(3), KX(4), MTYPE

  NUM    = ELEMENT NUMBER 
  KX(1)  = FIRST NODE
  KX(2)  = SECOND NODE
  KX(3)  = THIRD NODE
  KX(4)  = FOURTH NODE, IF QUAD, = KX(3) IF TRIANGLE
  MTYPE  = ELEMENT MATERIAL NUMBER

5.  Convecting Edge Boundary Conditions, if NUMCBC > 0
  I, J, H, TEMP

  I      = FIRST EDGE NODE
  J      = SECOND EDGE NODE
  H      = CONVECTION COEFFICIENT
  TEMP   = EXTERNAL CONVECTION TEMPERTURE

Remarks:  While quadrilaterals are allowed in the input they are actually
split into four triangles around the centroid of the element.  The new
centroid node is removed by "static condensation" and does not appear in
the output.

Planar problems are for a unit thickness. Axisymmetric problems use a one
radian segment.
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