Manual pages | Cast3M

$$$$ FFOR     NOTICE  PV        13/12/03    21:15:01     7875           
                                             DATE     13/12/03

     Operateur FFOR                          Voir aussi : MODE RAYE
     --------------                                       RAYN   
      CH2 = FFOR  MODL1 CHE1 ;

  

                                                                         

     Description :
     ____________

     This operator calculates the view factors matrix corresponding to
 a geometry that discretizes an enclosure.


      Contents :
      _________

     MODL1 : modeled structure (MMODEL type)

     CHE1  : MCHAML object of materials
             (coefficient of absorption if needed)                     
     Notes :
     ______
                                                                         
  1. The trigonometric orientation of the elements (associated
     to the order of description of the nodes in each element)
     defines a normal direction which must correspond to the
     radiating side.
     This condition is absolutely necessary.

  2. The revolution axis (in cylindrical geometry) must not be
     meshed. An symetry axis must not be meshed.

  3. The option 'SYME' is not available in cylindrical geometry (in
     order to define an axis different from the revolution axis).

  4. The option IMPI of operator OPTI gives the errors made on
     the balances and the reciprocity conditions

  5. In case of a participating medium the absorption coefficient must
     be negative. The enclosure is at a uniform temperature and does
     not scatter.
     This option is not compatible with the options 'SYME' or 'CVXE'.

  6. The unity for the temperature is the degree Kelvin.
     (cf. operator RAYN).