Dear Jianwen,
we don't have the option to choose both pressures as primary variables.
But instead pressure + saturation. But you can calculate a saturation
from the inverse capillary-pressure-saturation relation sw =
pc^-1(pn-pw) where you specify pn and pw.
When using the Box discretization scheme you can use mixed boundary
conditions. For the cell-centered schemes you need to realize this by
using solution-dependent Neumann conditions, see for example the
following test "porousmediumflow/1pnc/1p2c/isothermal/problem.hh"
Best,
Martin
On 05.06.24 05:59, Jianwen Du wrote:
Dear DuMux developers,
Please forgive me for having some basic questions.
I wonder if DuMux allows setting the boundary condition for a
two-phase flow problem by specifying the pressure of both phases. From
the example models I've seen, it seems that only one phase's pressure
and one phase's saturation are applied. Additionally, I think it
should be possible to use a mixed boundary condition, where the
Dirichlet boundary is set for one phase and the Neumann boundary for
another phase. Would you be able to tell me where I can find some
examples or guidance available for these?
Sincerely,
Jianwen
--
Ph.D. student
Hydrology and Atmospheric Sciences
University of Arizona
[email protected]
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