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view +grid/boundaryIdentifier.txt @ 561:3a13916f8ff0 feature/grids/laplace_refactor

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Switch to using boundary ops for normal derivative
author Jonatan Werpers <jonatan@werpers.com>
date Tue, 29 Aug 2017 13:10:57 +0200
parents 763d50caddf3
children
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A grid.boundaryIdentifier identifies a boundary of a grid.
For a Cartesian grid it is simply 's', 'n', 'w', 'e'.
For a multiblock grid it might be something like {1, 's'}.
For some other grid it will be up to the developer to chose
a good way to identify boundaries.