Cohesive单元-7.pdf

节选段落一：
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


节选段落二：
The fluid is assumed to be
incompressible, and the formulation is based on a statement of flow continuity that considers tangential and
normal flow and the rate of opening of the cohesive element.
Figure 1. Flow within cohesive elements.


节选段落三：
If
the top and bottom surfaces of the pore pressure cohesive elements are used to define the contact surface, the
fluid flux should be controlled by the cohesive element definition. Therefore, the pore fluid contact property
definition should be deactivated.