%SUMMATION_BE%

summation of a scalar value with respect to boundary elements

INTEGRATION($IntInd$) = ( %SUMMATION_BE%, ExpressionOfIntegrand, $PostprocessTag1$, $PostprocessTag2$, ... )

The POSTPROCESS-flags $PostprocessTag1$, $PostprocessTag2$, ... define the considered boundary elements. The number of POSTPROCESS-flags is not limited. Summation of a given functional $ f$ (ExpressionOfIntegrand) with respect to the set of boundary elements $ BE$ identified by the POSTPROCESS-flags:

\begin{align} I_\text{SumBE} = \sum_{i \in BE} f_i\end{align}

Note: In contrast to %SUMMATION_BND%, ExpressionOfIntegrand is defined and evaluated on the boundary elements and not on the MESHFREE point cloud!