*HEADING
 TEST CLEARANCE  DEPENDENT GAP RADIATION (C3D6T)   
*PHYSICAL CONSTANTS, ABSOLUTE ZERO=-460., STEFAN=1.E-8   
*NODE,NSET=BAR
1, 0.,0.,0.
2, .5,0.,0.
3, 1.,0.,0.
4, 0.,0.,-1
5, 0.5,0.,-1
6, 1.,0.,-1
101, 0.,1.,0.
102, 0.5,1.,0.
103, 1.0,1.,0.
104, 0.,1.,-1
105, 0.5,1.,-1
106, 1.0,1.,-1
*NODE
1003, 1.01,1.1,0.1
1004, 1.01,-0.1,0.1
1005, 1.01,-0.1,-1.1
1006, 1.01,1.1,-1.1
1007, 1.01,0.5,0.1
1008, 1.01,-0.1,-0.5
1009, 1.01,0.5,-1.1
1010, 1.01,1.1,-0.5
*NSET,NSET=LEFT
1,101,4,104
*ELEMENT,TYPE=C3D6T,ELSET=ROD
1,1,5,4,101,105,104
2,1,2,5,101,102,105
3,2,6,5,102,106,105
4,2,3,6,102,103,106
*SOLID SECTION,ELSET=ROD,MATERIAL=A1
1., 
*MATERIAL,NAME=A1
*ELASTIC
1.E5, 
*EXPANSION
1.E-5, 
*CONDUCTIVITY
1., 
*DENSITY
1., 
*SPECIFIC HEAT
1., 
*NODE, NSET=WALL
9999,2.,0.5
*ELEMENT, TYPE=HEATCAP, ELSET=HCAP
9999,9999
*ELEMENT,ELSET=RIGID,TYPE=S4T
1001,1003,1004,1005,1006
*SHELL SECTION,ELSET=RIGID,MATERIAL=A1
1.0
*RIGID BODY, REF NODE=9999,ELSET=RIGID,ISOTHERMAL=YES
*HEATCAP, ELSET=HCAP
1.0,
*SURFACE,TYPE=ELEMENT,NAME=RIGHT
4,S4
*SURFACE,TYPE=ELEMENT,NAME=WALL
RIGID,SNEG
*CONTACT PAIR,INTERACTION=GAP
RIGHT,WALL
*SURFACE INTERACTION,NAME=GAP
*GAP RADIATION
1.0,1.0
1.,0.
0.,0.02
*BOUNDARY
BAR,2,3
LEFT,1
WALL,1,6
*STEP
*COUPLED TEMPERATURE-DISPLACEMENT,STEADY STATE
0.5,1.0
*BOUNDARY
LEFT,11,11,400.
WALL,11,11,200.
*OUTPUT,FIELD,VARIABLE=PRESELECT,FREQ=999
*ELEMENT OUTPUT,ELSET=ROD
S,E
*NODE FILE,FREQ=999
U, 
NT, 
*OUTPUT, HISTORY,FREQ=1
*NODE OUTPUT, NSET=BAR
U,NT
*NODE OUTPUT,NSET=WALL
U, 
*ENERGY OUTPUT,ELSET=ROD
ALLIE,ALLKE,ALLAE
*END STEP