Dear Georg,
I am not sure if I got you right, you want to have a fixed Saturation
(Dirichlet) for one phase and inject another phase?
In Dumux you can choose the equation that should be replaced by the
Dirichlet condition with the call:
setDirichlet(int pvIdx, int eqIdx)
The equation you choose cannot be assigned to a Neumann BC anymore.
The rest of the equations can be assigned as Neumann BCs.
Maybe you could list the type of BC you would like to have for each
equation?
Secondly, I stumbled across the outflow boundary condition recently
what is the physical idea behind this type of boundary condition?
For the box method the outflow condition uses the gradients evaluated at
the integration point of the boundary face to calculate the flux out of
the domain for the equation you choose.
Best regards
Alex
On 29.07.2015 16:14, [email protected] wrote:
Hello Dumux,
I am working with the (implicit, box) mpnc-model with a 2p5c
fluidsystem and I would like to specify the following inlet boundary
conditions to my system: gas pressure, saturation and phase
composition. This can be done with a Dirichlet condition and it works
fine. But additionally, I would like to set the gas flux into the
model domain (basically the pressure gradient) which would mean
setting a Neumann boundary condition. Is there a way to do this in Dumux?
Secondly, I stumbled across the outflow boundary condition recently
what is the physical idea behind this type of boundary condition?
Thanks for your help!
Georg Futter
——————————————————————————
*German Aerospace Center *(DLR)
Institute of Engineering Thermodynamics | Computational
Electrochemistry | Pfaffenwaldring 38-40 | 70569 Stuttgart
Dipl.-Ing. *Georg Futter* | Ph.D. student
Telefon 0711/6862-8135 | [email protected] <mailto:[email protected]>
www.DLR.de <http://www.dlr.de/>
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