Hello Dumuxers, I was wondering why the diffusive fluxes in Dumux are defined as D*rho*grad(mol-or-massfraction). Typically one would use D*grad(c) (e.g. Ficks law) where c=rho*mol-or-massfraction. Using the Dumux equation means that local differences in the density are neglected for diffusive fluxes. Is there any reason/justification for this? Or is my thinking just wrong?
Best regards 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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