*HEADING
: THREE DIMENSIONAL HEAT TRANSFER INTERFACE
          GAP CONDUCTANCE
          TIED CONTACT WITH ADJUST
*RESTART, WRITE
*NODE
*NSET, NSET = FACE2
*NSET,NSET=GAP1,GENERATE
*ELEMENT, TYPE=DC3D20, ELSET=MID
*ELEMENT, TYPE=DC3D20, ELSET=TOP
*ELEMENT, TYPE=DC3D20, ELSET=BOT
*ELSET, ELSET = SOLID
*surface, NAME=SURF1
TOP,S3
*surface, NAME=SURF2
MID,S5
*surface, NAME=SURF3
MID,S3
*surface, NAME=SURF4
BOT,S5
*CONTACT PAIR, INTERACTION =TIED, ADJUST=0.1, TIED
SURF1, SURF2
*CONTACT PAIR, INTERACTION=GAPS
SURF3, SURF4
*SURFACE INTERACTION, NAME=TIED
*SURFACE INTERACTION, NAME=GAPS
*GAP CONDUCTANCE
*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