FlowPenetrationBoundaries

Boundary points of a boundary penetrated by flow, have to adapt their representative mass simply by: \begin{align} \frac{d\overset{\scriptscriptstyle\frown}{m}_{i}}{dt}=\rho _{i}\left( \mathbf{n}_{i}^{T}\cdot \mathbf{v}_{i} \right)A_{i}\end{align} where \( A_{i}\) is the area occupied by the boundary point to be found in %ind_dA% .