*HEADING
: THREE  DIMENSIONAL HEAT TRANSFER INTERFACE
          GAP CONDUCTANCE
          TIE CONSTRAINT WITH ADJUST
*RESTART, WRITE
*NODE
1,   10.0,     0.0
2,   11.0,     0.0
3,   11.0,     0.5
4,   10.0,     0.5
5,   10.0,     0.0,   -1.
6,   11.0,     0.0,   -1.
7,   11.0,     0.5,   -1.
8,   10.0,     0.5,   -1.
9,   10.0,     0.55
10,  11.0,     0.55
11,  11.0,     1.00
12,  10.0,     1.00
13,   10.0,     0.55,   -1.0
14,   11.0,     0.55,   -1.0
15,   11.0,     1.00,   -1.0
16,   10.0,     1.00,   -1.0
17,   10.,       -1.0
18,   11.,       -1.0
19,   11.,       -0.1
20,   10.,       -0.1
21,   10.0,   -1.0,  -1.
22,  11.0,    -1.0,  -1.0
23,  11.0,    -0.1,  -1.0
24,  10.0,    -0.1,  -1.0
*NSET,NSET=FACE2
12,11,15,16
*NSET,NSET=GAP1,GENERATE
17,24,1
*ELEMENT,TYPE=DC3D8,ELSET=MID
1, 1,2,6,5,4,3,7,8
*ELEMENT,TYPE=DC3D8,ELSET=TOP
2,9,10,14,13,12,11,15,16
*ELEMENT,TYPE=DC3D8,ELSET=BOT
3,17,18,22,21,20,19,23,24
*ELSET, ELSET=SOLID
1,2,3
*surface, NAME=SURF1
TOP, S1
*surface, NAME=SURF2
MID,S2
*surface, NAME=SURF3
MID, S1
*surface, NAME=SURF4
BOT,S2
*TIE,NAME=TIE,POSITION TOLERANCE=0.1
SURF1, SURF2
*CONTACT PAIR, INTERACTION=GAPS
SURF3, SURF4
*SURFACE INTERACTION,NAME=GAPS
*GAP CONDUCTANCE
10., 0.
10., 1.
*SOLID SECTION,ELSET=SOLID,MATERIAL=SOLMAT
*MATERIAL,NAME=SOLMAT
*CONDUCTIVITY
1., 
*STEP
*HEAT TRANSFER, STEADY STATE
*NODE FILE
 NT,
 RFL,
*EL PRINT,FREQ=0
*NODE PRINT
 NT,
 RFL,
*BOUNDARY,OP=NEW
FACE2,11,,100.
GAP1,11,,50.
*CONTACT PRINT
*CONTACT FILE
*END STEP