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$$$$ FPAL     NOTICE  CHAT      11/09/12    21:16:18     7124           
                                             DATE     11/09/12

     Operateur FPAL                          Voir aussi : FPA KUET
     --------------                                       ECHI   
     AK = FPAL  NU ROF UET NOR ROG RAP $PAROI ;

                                                                                


     Description :
     _____________

    Wall function for aerosols : Computes the deposition velocity of
    aerosols in the case of laminar flow.
                                  

     COMMENTS :
     __________


AK      particule deposition velocity  (m/s)   CHPOINT SCAL CENTRE PAROI

NU      gas viscosity (m2/s)                   FLOTTANT

ROF     gas density (kg/m3)                    FLOTTANT

UET     friction velocity (kg/m3)              CHPOINT SCAL CENTRE PAROI

NOR     field of the normals to the faces (m)  CHPOINT VECT FACE  DOMTOT

ROG     particule density x gravity (kg/m2s2)  POINT

RAP     particule radius (m)                   FLOTTANT

$PAROI  deposit line (in 2D)                   MMODEL TYPE 'NAVIER_STOKES'




     Remarks :
     _________

- UET is computed by KUET (for laminar flow).
- NOR is computed by DOMA over all the field (option 'NORMALE').
- AK is the exchange coefficient for the mass, which is given to the
  ECHI operator which computes the deposit boundary condition for
  the concentration equation (oper. TSCA).
- THIS OPERATOR IS NOT AVAILABLE IN 3D.