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$$$$ ADVE     NOTICE  CHAT      11/09/12    21:15:04     7124           
                                             DATE     11/09/12

  Operateur ADVE                               Voir aussi :    
     --------------                                                       
     ADV1 = ADVE MOD1 CHMAT1 ('SYMM') ; 



     Description:                                    
     ____________              
                                                                         
     The ADVE operator builds a stiffness matrix of the type:
                 /
      (ADV1)ij = ] Nj (a . grad(Ni)) dx ,
                 /
     a being a vector field of two components. This matrix is non
     symmetric and arises, for instance, in the tangent stiffness
     matrix of temperature nonlinear problems. This operator is only
     available in TWO dimensions THERMIQUE ISOTROPE formulations,
     with ELEMENTS MASSIFS A INTEGRATION NUMERIQUE.


     Contents:                                                        
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      MOD1   :  MMODEL of the type THERMIQUE ISOTROPE

      CHMAT1 :  MCHAML with a 'CARACTERISTIQUES' type and having 
                two components whose name are 'JX   ' and 'JY  '

      ADV1   :  RIGIDITE with non symmetric elementary matrices


     Notes:                                                              
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        1.- If the key word 'SYMM' is present, the result is the
            symmetric part of the original matrix, that is:
                     /
          (ADV1)ij = ] [Nj (a . grad(Ni)) + Ni (a . grad(Nj))]/2 dx 
                     /
            In this case, the resulting RIGIDITE has symmetric
            elementary matrices.