Re: [DuMux] Model coupling in DUMUX
Dear Timo, Thanks a lot. Indeed, it seems that the strategy for 1ptracer is exactly what we want to do so it will be a very good starting point even if the two phase case is more complex. I will have probably other questions soon. Regards Etienne Le 08/03/2022 à 18:34, Timo Koch a écrit : Dear Etienne, unfortunately there is currently no example of such a simulation setup with two-phase flow. But there is a simple example for one-phase flow + transport example: https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/tree/master/examples/1ptracer Consider two things: (1) The "multi-domain” framework with coupling managers is only really needed for assembling coupled multi-domain Jacobians. In the sequential case you describe this should not be necessary. Basically the first solver dumps everything the second solver needs to know into some containers (std::vectors for example) and the second problem/spatialparams take these values. In the main fail you just solve two problems after each other and exchange data in-between. This is for example done in the 1ptracer example (only that there the tracer quantities don’t couple back but that’s the same process). (2) There is unfortunately no very consistent way of accessing the time discretisation information. This means if for example for your reactive transport problem you need both the saturation at the old time step and at the new time step, you need to manually overload the storage term evaluation in the base local residual class and make sure that the correct quantities for the respective time level are obtained from e.g. the spatial params (if you decide to store saturation from the other problem there). The spatial params would store both old and new saturations from the two phase flow model in this example. Hope this is good as a starting point Timo On 8. Mar 2022, at 18:13, Etienne Ahusborde wrote: Hello DuMuX users, With my colleague we work on the simulation of thermo-hydro-chemical processes in porous media. We developed a fully implicit scheme and now we would like to compare it with a sequential scheme. For this we would like to solve a non isothermal compositionnal two phase flow and then a reactive transport problem. For instance, the first subproblem would compute saturations, pressure, temperature while the chemistry will be explicited. Then, these quantities would be given to the second subproblem that would calculate mole fractions of all chemical species and concentrations of minerals. The dissolution/precipitation of minerals could modify the new porosity that would be given to the first subproblem We looked how DUMUX could do this. It seems that the different coupling modes currently available (boundary, embedded mixed dimension, conforming mixed dimension facet) are not suitable but maybe we are wrong. We think that a strategy similar to the one used to coupled flow and geomechanics (/geomechanics/poroelastic/couplingmanager.hh) could be a good point of departure? Could you please confirm us what in your opinion could be the best way to proceed using the current DuMuX capacities? Thanks in advance Regards Etienne ___ DuMux mailing list DuMux@listserv.uni-stuttgart.de https://listserv.uni-stuttgart.de/mailman/listinfo/dumux ___ DuMux mailing list DuMux@listserv.uni-stuttgart.de https://listserv.uni-stuttgart.de/mailman/listinfo/dumux
Re: [DuMux] Model coupling in DUMUX
Dear Etienne, unfortunately there is currently no example of such a simulation setup with two-phase flow. But there is a simple example for one-phase flow + transport example: https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/tree/master/examples/1ptracer Consider two things: (1) The "multi-domain” framework with coupling managers is only really needed for assembling coupled multi-domain Jacobians. In the sequential case you describe this should not be necessary. Basically the first solver dumps everything the second solver needs to know into some containers (std::vectors for example) and the second problem/spatialparams take these values. In the main fail you just solve two problems after each other and exchange data in-between. This is for example done in the 1ptracer example (only that there the tracer quantities don’t couple back but that’s the same process). (2) There is unfortunately no very consistent way of accessing the time discretisation information. This means if for example for your reactive transport problem you need both the saturation at the old time step and at the new time step, you need to manually overload the storage term evaluation in the base local residual class and make sure that the correct quantities for the respective time level are obtained from e.g. the spatial params (if you decide to store saturation from the other problem there). The spatial params would store both old and new saturations from the two phase flow model in this example. Hope this is good as a starting point Timo > On 8. Mar 2022, at 18:13, Etienne Ahusborde > wrote: > > Hello DuMuX users, > > With my colleague we work on the simulation of thermo-hydro-chemical > processes in porous media. > > We developed a fully implicit scheme and now we would like to compare it with > a sequential scheme. > > For this we would like to solve a non isothermal compositionnal two phase > flow and then a reactive transport problem. > > For instance, the first subproblem would compute saturations, pressure, > temperature while the chemistry will be explicited. Then, these quantities > would be given to the second subproblem that would calculate mole fractions > of all chemical species and concentrations of minerals. The > dissolution/precipitation of minerals could modify the new porosity that > would be given to the first subproblem > > We looked how DUMUX could do this. It seems that the different coupling modes > currently available (boundary, embedded mixed dimension, conforming mixed > dimension facet) are not suitable but maybe we are wrong. > > We think that a strategy similar to the one used to coupled flow and > geomechanics (/geomechanics/poroelastic/couplingmanager.hh) could be a good > point of departure? > > Could you please confirm us what in your opinion could be the best way to > proceed using the current DuMuX capacities? > > Thanks in advance > > Regards > > Etienne > > > ___ > DuMux mailing list > DuMux@listserv.uni-stuttgart.de > https://listserv.uni-stuttgart.de/mailman/listinfo/dumux ___ DuMux mailing list DuMux@listserv.uni-stuttgart.de https://listserv.uni-stuttgart.de/mailman/listinfo/dumux
[DuMux] Model coupling in DUMUX
Hello DuMuX users, With my colleague we work on the simulation of thermo-hydro-chemical processes in porous media. We developed a fully implicit scheme and now we would like to compare it with a sequential scheme. For this we would like to solve a non isothermal compositionnal two phase flow and then a reactive transport problem. For instance, the first subproblem would compute saturations, pressure, temperature while the chemistry will be explicited. Then, these quantities would be given to the second subproblem that would calculate mole fractions of all chemical species and concentrations of minerals. The dissolution/precipitation of minerals could modify the new porosity that would be given to the first subproblem We looked how DUMUX could do this. It seems that the different coupling modes currently available (boundary, embedded mixed dimension, conforming mixed dimension facet) are not suitable but maybe we are wrong. We think that a strategy similar to the one used to coupled flow and geomechanics (/geomechanics/poroelastic/couplingmanager.hh) could be a good point of departure? Could you please confirm us what in your opinion could be the best way to proceed using the current DuMuX capacities? Thanks in advance Regards Etienne ___ DuMux mailing list DuMux@listserv.uni-stuttgart.de https://listserv.uni-stuttgart.de/mailman/listinfo/dumux
