Defining the constitutive response of fluid transitioning from Darcy flow to Poiseuille flow

The cohesive element fluid flow model:

  • is typically used in geotechnical applications, where fluid flow continuity within the cohesive element and through the interface must be maintained;

  • supports the transition from Darcy flow to Poiseuille flow (gap flow) as damage in the element initiates and evolves;

  • enables modeling of an additional resistance layer on the surface of the cohesive element to model fluid leakoff into the formation;

  • enables fluid pressure on the cohesive element surface to contribute to its mechanical behavior, which enables the modeling of hydraulically driven fracture;

  • can be used only in conjunction with traction-separation behavior;

  • supports fluid flow continuity between intersecting layers of cohesive pore pressure elements; and

  • enables gravity-induced fluid flux modeling.

The following topics are discussed:

Related Topics
About cohesive elements
Defining the constitutive response of cohesive elements using a traction-separation description
Defining the constitutive response of fluid within the cohesive element gap
In Other Guides
*FLUID LEAKOFF
*GAP FLOW
*PERMEABILITY
Adhesive joints and bonded interfaces
Element type assignment

ProductsAbaqus/StandardAbaqus/CAE