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add draft description to methodology on white boundary condition

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Jiankai Yu 2019-09-15 15:45:58 -04:00
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docs/source/methods/geometry.rst
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@ -617,6 +617,10 @@ condition has been applied, the particle is killed and any surface current
tallies are scored to as needed. If a reflective boundary condition has been
applied to the surface, surface current tallies are scored to and then the
particle's direction is changed according to the procedure in :ref:`reflection`.
Note that the white boundary condition can be considered as the speciall case of
reflective boundary condition, where the same processing method will be applied to
deal with the surface current tallies scoring, except for determining the
changes of particle's direction according to the procedures in :ref:`white`.
Next, we need to determine what cell is beyond the surface in the direction of
travel of the particle so that we can evaluate cross sections based on its
@ -892,6 +896,13 @@ Dxy + Eyz + Fxz + Gx + Hy + Jz + K = 0`. Thus, the gradient to the surface is
\\ 2Cz + Ey + Fx + J \end{array} \right ).
.. _white:
------------------------------
White Boundary Conditions
------------------------------
.. _constructive solid geometry: http://en.wikipedia.org/wiki/Constructive_solid_geometry
.. _surfaces: http://en.wikipedia.org/wiki/Surface
.. _MCNP: http://mcnp.lanl.gov