3D hollow thermal tube

Short example that shows how to impose boundary conditions in a polar frame (3D). The inner radius is 1.0 and the outer radius is 2.0. The outer boundary has an imposed temperature of 100.0 and the inner boundary has a radial flux of 10.0. Top and bottom are thermally insulated.

feap * * 3D Thermal tube example
0 0 0 3 1 8

MATErial
 THERMAL
  FOURIER ISOTropic 100

! Define block using r,theta
BLOCk
 POLAr 10 40 4
 1  1.0 0.0   0.0
 2  2.0 0.0   0.0
 3  2.0 360.0 0.0
 4  1.0 360.0 0.0
 5  1.0 0.0   4.0
 6  2.0 0.0   4.0
 7  2.0 360.0 4.0
 8  1.0 360.0 4.0

! Use polar option to eboun
EBOUN
 POLAr
 1 2.0 1

! Set thermal dof(1) to 100
CSURface
  DISP 1
  POLAr
   SURFace
    1 2.0 0.0   0.0 100.0
    2 2.0 360.0 0.0 100.0
    3 2.0 360.0 4.0 100.0
    4 2.0 0.0   4.0 100.0

! Set the flux to 10
CSURface
 FLUX 
 POLAr
  SURFACE
   1 1.0 0.0   0.0 10.0
   2 1.0 0.0   4.0 10.0
   3 1.0 360.0 4.0 10.0
   4 1.0 360.0 0.0 10.0
  
END

TIE

BATCh
 LOOP,,10
  TANG,,1
 NEXT
 PLOT,PERS
 PLOT,HIDE
 PLOT,FRAME,1
 PLOT,CONT
 PLOT,FRAME,2
 PLOT,FLUX,1
 PLOT,FRAME,3
 PLOT,FLUX,2
 PLOT,FRAME,4
 PLOT,FLUX,3
END


INTEractive
STOP