Pressure
Use the Pressure node to specify the pressure on a boundary. In many cases the distribution of pressure is known, giving a Dirichlet condition p = p0 where p0 is a known pressure given as a number, a distribution, or an expression involving time, t, for example.
Pressure
Enter a value or expression for the Pressure p0(SI unit: Pa). Enter a relative pressure value in p0 (SI unit: Pa).
For the Subsurface Flow Module, the Pressure node provides the pressure P0 as a condition on edges in 3D models. Then select the edges under Edge Selection.
Constraint Settings
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog box.
Pressure constraint on edges are available for use with the Fracture Flow boundary condition (which is available in the Subsurface Flow Module). This boundary condition needs constraints on the edges surrounding the fracture-flow boundary. In other cases, pressure constraints on edges are not implemented.