usnistgov / fipy

FiPy is a Finite Volume PDE solver written in Python
http://pages.nist.gov/fipy/en/latest
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Issue1000 examples.diffusion.mesh1D constrains a gradient but calls it a flux #1001

Closed guyer closed 5 months ago

guyer commented 5 months ago

Migration from FixedFlux boundary conditions to faceGrad constraints missed conceptual switch from boundary condition on $D\frac{\partial C}{\partial x} = J$ to $\frac{\partial C}{\partial x} = J/D$.

Fixes #1000 Addresses #999