To define the volume porosity and surface porosity that are uniform in every direction in space on a sub-area.

Porosity was only usable in VDF discretization, and now available for VEF P1NC/P0.

Observations :

Surface porosity values must be given in every direction in space (set this value to 1 if there is no porosity),
Prior to defining porosity, the problem must have been discretized.

Can \'t be used in VEF discretization, use Porosites_champ instead.

Parameters:

aco (type: string into ['{']) Opening curly bracket.
sous_zone | sous_zone1 (type: string) Name of the sub-area to which porosity are allocated.
bloc (type: bloc_lecture_poro) Surface and volume porosity values.
[sous_zone2] (type: string) Name of the 2nd sub-area to which porosity are allocated.
[bloc2] (type: bloc_lecture_poro) Surface and volume porosity values.
acof (type: string into ['}']) Closing curly bracket.