Hi, no the default is backward differences (implicit Euler).
You can set the mode as third template argument (of type bool) of the FVAssembler class. See e.g. https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/blob/master/test/porousmediumflow/tracer/constvel/main.cc <https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/blob/master/test/porousmediumflow/tracer/constvel/main.cc> (note that IMPLICIT in this example is a preprocessor variable set to true or false in the CMakeLists.txt) Best Timo > On 21. May 2021, at 16:55, Mahmoud Atef Mahmoud Mohamed Aboelseoud S277151 > <[email protected]> wrote: > > > Dear Timo, > > > Thanks a lot for the quick answer, is the forward difference implemented by > default? > > > > Regards, > > > Mahmoud > > > > > > > > > > > > > > > ------------------------------------------------------------------------------------------------- > Il 2021-05-21 16:30 Timo Koch ha scritto: >> You can currently use Forward or Backward differences. But only first >> order one-step methods are implemented. >> Higher order time one step multi-stage time discretisation methods >> sort of work on an experimental branch >> (track >> https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/issues/940 >> for current status) and some components have been merged >> but it’s going to take some time to make it into master. >> Timo >>> On 21. May 2021, at 16:25, Mahmoud Atef Mahmoud Mohamed Aboelseoud >>> S277151 <[email protected]> wrote: >>> Hello Dumux team, >>> I have a small question please. Does Dumux use the first order >>> difference quotient for temporal discretization as shown in page 32 >>> of the handbook v3.3 or it was just an example? >>> Best Regards, >>> Mahmoud >>> _______________________________________________ >>> DuMux mailing list >>> [email protected] >>> https://listserv.uni-stuttgart.de/mailman/listinfo/dumux >> _______________________________________________ >> DuMux mailing list >> [email protected] >> https://listserv.uni-stuttgart.de/mailman/listinfo/dumux > _______________________________________________ > DuMux mailing list > [email protected] > https://listserv.uni-stuttgart.de/mailman/listinfo/dumux
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