*HEADING
INF LONG FINNED TUBE INSIDE INF LONG TUBE, DCAX4, PER SYMM (NR=10)
*PREPRINT
*PHYSICAL CONSTANTS, STEFAN=5.669E-8,ABSOLUTE ZERO=0.0
*NODE
1,8.,2.
13,32.,2.
181,8.,20.
193,32.,20.
*NGEN,NSET=LHS
1,181,20
*NGEN,NSET=RHS
13,193,20
*NFILL,NSET=ALLN
LHS,RHS,12
*NSET,NSET=OUTN,GEN
81,93
*ELEMENT,TYPE=DCAX4,ELSET=CONDEL
1,1,2,22,21
12,12,13,33,32
*ELGEN,ELSET=CONDEL
1,9,20,20
12,9,20,20
81,5,1,1
*ELSET,ELSET=OUTEL,GEN
81,92
*SOLID SECTION,ELSET=CONDEL,MATERIAL=ALUM
*MATERIAL,NAME=ALUM
*CONDUCTIVITY
204., 
*DENSITY
2707., 
*SPECIFIC HEAT
896., 
***  CAVITY DEFINITION
*ELSET,ELSET=ELHS,GEN
1,61,20
101,161,20
*ELSET,ELSET=ERHS,GEN
12,172,20
*ELSET,ELSET=EBLOCK,GEN
82,85
*surface,NAME=SURF,PROPERTY=PROP
ELHS,S2
ERHS,S4
EBLOCK,S1
EBLOCK,S3
85,S2
*CAVITY DEFINITION,NAME=CAVAXI,AMB=200.
SURF, 
*SURFACE PROPERTY,NAME=PROP
*EMISSIVITY
0.5, 
***
*INITIAL CONDITIONS,TYPE=TEMPERATURE
ALLN,300.
*RESTART,WRITE,FREQ=10
*STEP,INC=20
*HEAT TRANSFER,STEADY STATE
1.,1.
*BOUNDARY
LHS,11,,1000.
RHS,11,,400.
*RADIATION VIEW,REFLECTION=NO,SYMM=ZPER
*RADIATION SYMMETRY,NAME=ZPER
*PERIODIC,NR=10,TYPE=ZDIR
2.,18.
*NODE PRINT,NSET=OUTN
NT, 
*NODE FILE,NSET=OUTN
NT, 
*RADIATION PRINT
RADFL,VFTOT,FTEMP
*RADIATION FILE,ELSET=OUTEL
RADFL,VFTOT,FTEMP
*VIEWFACTOR OUTPUT,CAVITY=CAVAXI
*END STEP