%MASSFLOW_DROPLETPHASE%

mass flux integration of a functional by counting the DROPLETPHASE points that are injected at all inflow surfaces

This integration statement is deprecated since the same tasks can be achieved with %INTEGRATION_FLUX_IN% in current versions of MESHFREE. Despite the naming, this integration statement determines the volume flux resulting from all DROPLETPHASE points that were added in the current time step.

INTEGRATION($IntInd$) = ( %MASSFLOW_DROPLETPHASE%, ExpressionOfIntegrand )

It computes the flux of a functional $ f$ (ExpressionOfIntegrand) across all inflow surfaces in the sense:

\begin{align} I_\text{Flow} = \int\limits_{\partial\Omega} f dA\end{align}

This integral is approximated by summing up the DROPLETPHASE points which are currently injected at all inflow surfaces $ \partial\Omega$:

\begin{align} I_\text{Flow} \approx \sum_{i \in P_\text{injected}} f_i \cdot \frac{V_i}{\Delta t}\end{align}

$ P_\text{injected}$ is the set of all DROPLETPHASE points which are injected at $ \partial\Omega$ in this time step. The current volume of a DROPLETPHASE point is determined by:

\begin{align} V_i = \frac{\pi}{6} d_i^3,\end{align}

where $ d_i$ is the mean diameter of the DROPLETPHASE (see %ind_d30%). Example: massflow of DROPLETPHASE through all inflows

INTEGRATION($massflow$) = ( %MASSFLOW_DROPLETPHASE%, [Y%ind_r%] )

Note:

Details on the DROPLETPHASE can be found in the section Solvers, see KindOfProblem and the respective link.
Skip is not recommended for this type of integration statement.