Manual pages | Cast3M

$$$$ DMMU     NOTICE  CHAT      11/09/12    21:15:54     7124           
                                             DATE     11/09/12

    Operateur DMMU                           Voir aussi : MHYB BMTD
    --------------                                        DMTD          
   CHP3 = 'DMMU'  TAB1 RIG1  CHP1 (CHP2) ;


    Description :
    _____________

    This operator is used with a hybrid mixed finite element method.
    D is the divergence matrix for one element. D is actually a line
    matrix, the coefficients of which are all equal to 1.
    M is the diffusion elementary matrix.
    U is the convection elementary matrix.
    B is the matrix of correspondence between the global and local
     numbers of the faces.
    This operator calculates for each element the product :
                    -1   t                  -1 t
                D (M  -U) B  CHP1   or   D M    B  CHP1

    Contents :
    __________


       TAB1   : TABLE type, DOMAINE subtype; Contains geometrical
                supports  (cf. DOMA).

       RIG1   : RIGIDITE type, DARCY subtype; Contains the inversed
                elementary matrices for hybrid elements (cf. MHYB).

       CHP1   : CHPOINT type, the geometrical support of which is 
                the mesh TAB1.FACE.

       CHP2   : CHPOINT type; Contains the flux of convection-speed
                through each face. The geometrical support of this
                field is TAB1.FACE. The component's field name is FLUX.
                If missing speed is not taken into account.

       CHP3   : CHPOINT type, the geometrical support of which is
               TAB1.CENTRE.
               The component's field names are those of CHP1.