can you add a comment on the open MR? Timo
> 23. nov. 2021 kl. 14:28 skrev Dmitry Pavlov <[email protected]>: > > > Timo, > > Thank you for the good news. I had to update from DuMux 3.4 to be able to > apply the patch, now it seems to work! I implemented the > SpatialParams::dispersionTensor. > > One quick question: is there an option to specify different dispersion > coefficients (tensors) for different components? I have one component that is > present only in water and another that is balanced between water and oil (oil > is immobile and not directly present in the model). > > Best regards, > > Dmitry > > > > > >> On 22.11.2021 17:24, Timo Koch wrote: >> Hi Dmitry, >> >> Dumux differentiates between diffusion (molecular diffusion) and dispersion >> (a scale effect). >> >> (Dispersion used to be implemented in dumux 2 but some problems and had not >> been reimplemented after 3.0 since no-one had an immediate used case.) >> >> However, you are asking in the right time because there is >> https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/merge_requests/2921 >> about to be merged, >> which adds dispersion back in. Maybe you can have a look at that if this >> would be suitable to model what you are looking for. >> >> Best wishes, >> Timo >> >>> On 22. Nov 2021, at 15:18, Dmitry Pavlov <[email protected]> wrote: >>> >>> Hello, >>> >>> It is well known that DuMux models (i. e. 1pnc) include diffusion term. If >>> the velocity of the flow is constant, diffusion and dispersion can >>> simultaneously be modeled via this one term. But in the case of a radial >>> flow, velocity decreases with distance from the source, so the dispersion >>> near the source is bigger than far from the source. >>> >>> Is there a way for the user to include e. g. pressure gradient into the >>> calculation of the diffusion term in 1pnc or 2pnc? >>> >>> Best regards, >>> >>> Dmitry >>> >>> >>> _______________________________________________ >>> DuMux mailing list >>> [email protected] >>> https://listserv.uni-stuttgart.de/mailman/listinfo/dumux >>
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