Simulate with complex geometries and complex physics
BEsum()
summation over values given on boundary elements
For a node point of a fixed boundary all neighboring boundary elements, e.g. triangles, are collected.
The equation provided as argument is evaluated on each of these neighboring boundary elements
and finally summed up.
So far, BEsum only makes sense when used on nodes of the fixed boundary, e.g. in the context of a MOVE statement.
Example:
Warning: BEsum() can only have a reference to another equation. It is not possible to write down
values or any mathematical expressions directly.
begin_equation{$EqunName$}
... BEsum($eq_sum$) ...
end_equation
begin_equation{$eq_sum$}
...
end_equation