Hi Lorenzo, Here we are using episodes to simulate injection of low salinity water into a core saturated with oil with the following a sequence:
first: high salinity second: medium salinity third: low salinity At first we were using episodes from dumux 2.12, but those were no longer available in dumux 3.0 so we implemented our own. Brief explanation of how we use episodes: In our study we aim at determining the parameters for the material law (BC and BCM) which correspond to the core sample, and later apply these values to simulations for enhanced oil recovery in the field. For this we need to run thousands of simulations, for which dumux is quite good: friendly to perl and python scripts for unattended executions and programmed processing of the results. I am currently working on putting the code in accordance with dumux guidelines to suggest a merge into gitlab. In our approach we define the concept of stage, where each stage has a determined number of episodes. The idea behind this is that for each stage we have a determined number of experimental values and for each experimental value we define an episode. When each episode is concluded, the rms error of the simulation with regard to the experimental value is tabulated. The sum of rms errors is our objective function for minimization. The design behind our code is that the number of stages and the number of episodes behind each stage is specified from the input file, so that code does not have to be recompiled. I hope to have the merge request ready next week (I' an optimist), but if you're interested in looking at the code before hand (still missing some guideline comments and code format) I'll be happy to share it via my github account. BTW, using the restart command does not always work well (in 3.0), since data is saved as float while calculations are carried out as double. regard Edscott -----Mensaje original----- De: Dumux [mailto:dumux-boun...@listserv.uni-stuttgart.de] En nombre de lc Enviado el: viernes, 24 de enero de 2020 08:14 a. m. Para: dumux@listserv.uni-stuttgart.de Asunto: [DuMuX] about BC and episodes Dear Dumux-ers, I'm currently dealing with horizontal and vertical (5/9 spot patterns) wells with polymer and/or surfactant components in water/oil. I have a simple question: What is the best way to simulate the injection sequence? First: water+oil Second: polymer (in water) + oil Third: again fresh water + oil Does it make sense to define three episodes, with different Neuman BCs (injection) and lunching one after the other? Or is there a better way? Thank you, Regards, Lorenzo Campoli _______________________________________________ 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
