Hello,
I have a regular 2D Cartesian uniformly spaced mesh.
Due to some peculiarities of the physical system that I am currently working
with, the variable of interest in one of my PDEs, (fiPy CellVariable), is
undefined in certain interior node locations, i.e. we need to constrain them to
a value of float('nan'), when solving this PDE.
It is not satisfactory to merely constrain them to have a value of 0.0 in these
interior co-ordinates, because a) It is physically inaccurate since the values
are not defined here and b) Because we need to couple this PDE to other PDEs,
the incorrect 0.0 values will propagate to other PDEs, thereby
polluting/corrupting their solutions too. And hence, the full system of
However, the following code snippet was deemed to be illegal when I tried it
out, since FiPy was checking for cellvariables to be strictly numeric (got a
value < eps error)
phi.constrain(float('nan'),mesh.y<=1.5)
How else can we enforce NaNs in these interior nodes in FiPy ?
Best Regards,
Krishna
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