On Thu, Dec 12, 2013 at 7:26 PM, Charles Reid <charlesre...@gmail.com> wrote: > Hi there, > > While using the AdsorbingSurfactantEquation class, defined in the > electroChem example, located in: > > fipy/examples/levelSet/electroChem/adsorbingSurfactantEquation.py > > I noticed two lines that seem erroneous, both related to the timestep used > for the solution. On line 331, the following code: > > self.eq.solve(var, > boundaryConditions=boundaryConditions, > solver = solver, > dt=1.)
Hi Charles, This isn't a mistake. I know it is very confusing. It should probably not take a time step at all. The equation in question is not controlled by the time step. It evolves with the zero level set. It stores values at cells that are close to the zero level set and when the zero level set moves the material is "pushed" by the zero level set from cell to cell. The main benefit of this method is that it is entirely conservative, but it is only first order accurate. Hope this helps to explain what''s happening a little bit. I can field more questions if you need to use it for a problem. Thanks for the patch and don't be shy about submitting more patches. Cheers, Daniel -- Daniel Wheeler _______________________________________________ fipy mailing list fipy@nist.gov http://www.ctcms.nist.gov/fipy [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ]
