Hi Daniel, Thank you very much! The code runs for me as well: fantastic!
I have to admit that the distinction between cell and face variables remains a bit obscure to me… The cell variable X_var is the composition of the system I am modelling. Then "G" in d2G is the Gibbs free energy (called f here https://www.ctcms.nist.gov/fipy/examples/cahnHilliard/generated/examples.cahnHilliard.mesh2DCoupled.html#module-examples.cahnHilliard.mesh2DCoupled <https://www.ctcms.nist.gov/fipy/examples/cahnHilliard/generated/examples.cahnHilliard.mesh2DCoupled.html#module-examples.cahnHilliard.mesh2DCoupled>), which is itself a function of the composition X_var (the spline function). I don’t know if these info are more useful to figure out if d2G should be cell or face variable? As I understood it, because I want to solve for X_var, this should be a cell variable and nothing else. By higher dimension do you also mean 2D? I know 2D requires a lot of changes, but I thought 2D required only a change of grid. In any case, 2D is not my top priority at the moment. Thank you again very much for your help! Clara > On 12 Jan 2018, at 12:04, Daniel Wheeler <daniel.wheel...@gmail.com> wrote: > > Hi Clara, > > The following changes made it run for me. I turned d2G into a face > variable and K into a variable that is updated in the sweep loop. I > also removed redefining the equation. FiPy's designed so you only need > to to create the equation once. I'm not sure what the values of d2G > correspond to. Which spatial location do they correspond to? Faces or > Cells. I'm assuming faces since there are 1001 of them. Also, this > might need to be adjusted for higher dimensions. > > Cheers, > > Daniel > > ~~~~ > $ git diff > diff --git a/Spinodal_fipy_FeNi_varT_runs_DEBUG.py > b/Spinodal_fipy_FeNi_varT_runs_DEBUG.py > index 715e79b..a82387e 100644 > --- a/Spinodal_fipy_FeNi_varT_runs_DEBUG.py > +++ b/Spinodal_fipy_FeNi_varT_runs_DEBUG.py > @@ -289,20 +289,21 @@ def > Get_spline_Chebnodes(X,N,T0,R,RefFe,RefNi,L0ex,L1ex,L2ex,Tmag,Bmag,p_fcc,A_f > return d2G > > > + > ## THIS IS WHERE I WOULD LIKE TO HAVE A FIPY VARIABLE TYPE FOR d2G. > d2G = > Get_spline_Chebnodes(Xf,100,T0,R,RefFe,RefNi,L0ex,L1ex,L2ex,Tmag,Bmag,p_fcc,A_fcc,Nv,Na)*1.0e-9 > - > +d2G_var = FaceVariable(mesh=mesh, value=d2G) > > ## Initial diffusion coefficient > -Diff = Mob*d2G > +Diff = Mob*d2G_var > > > ## Initial gradient energy (depending on the interfacial energy we want) > K = 2.0*kappa[id_mean_spino] > - > +K_var = Variable(K) > > ## Initial equation > -eq = TransientTerm(coeff=1.) == DiffusionTerm(Diff) - > DiffusionTerm(coeff=(Mob, K)) > +eq = TransientTerm(coeff=1.) == DiffusionTerm(Diff) - > DiffusionTerm(coeff=(Mob, K_var)) > > > plt.figure(figsize=(8,6)) > @@ -390,16 +391,16 @@ while time < duration: > Mob = M[step_T][id_mean_T] > > d2G = > Get_spline_Chebnodes(Xf,100,T_spino[step_T],R,RefFe,RefNi,L0ex,L1ex,L2ex,Tmag,Bmag,p_fcc,A_fcc,Nv,Na)*1.0e-9 > - > - Diff = Mob*d2G > + d2G_var[:] = d2G > > K = 2.0*kappa[step_T] > + K_var.setValue(K) > print 'Mob, Diff, K' > print Mob, Diff, K > print 'MAX CONCENTRATION' > print max(X_var) > > - eq = TransientTerm(coeff=1.) == DiffusionTerm(Diff) - > DiffusionTerm(coeff=(Mob, K)) > + > > > print datetime.now() - startTime > (END) > ~~~~ > > On Thu, Jan 11, 2018 at 2:35 PM, Clara Maurel <cmau...@mit.edu> wrote: >> Hi Daniel, >> >> Thank you for taking the time to look at this! My main code calls several >> text files and subroutine. I attach everything that is needed to run the >> code: > > -- > Daniel Wheeler > _______________________________________________ > fipy mailing list > fipy@nist.gov > http://www.ctcms.nist.gov/fipy > [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ]
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