Parallel Plates Permeability Model
Overview
The parallel plates permeability model defines the relationship between the hydraulic fracture aperture and its corresponding permeability following the classic lubrication model (Witherspoon et al. ) . In this model, the two fracture walls are assumed to be smooth and parallel to each other and separated by a uniform aperture.
where \(a\) denotes the hydraulic fracture aperture.
Remark: \(k\), dimensionally, is not a permeability (as it is expressed in \(m^3\)).
Parameters
The Parallel Plates Permeability Model can be called in the
<Constitutive> block of the input XML file.
This permeability model must be assigned a unique name via the
name attribute.
This name is used to assign the model to regions of the physical
domain via a materialList attribute in the <ElementRegions>
block.
The following attributes are supported:
Name |
Type |
Default |
Description |
|---|---|---|---|
name |
string |
required |
A name is required for any non-unique nodes |