4.2.1 Computing Moments

You can compute moments for the population balance model using the Population Balance Moments dialog box (Figure  4.2.1).

Report $\rightarrow$ Population Balance $\rightarrow$ Moments...

Figure 4.2.1: The Population Balance Moments Dialog Box

The steps for computing moments are as follows:

1.   For the discrete method, specify the Number of Moments. For the SMM and QMOM, the number of moments is set equal to the number of moments that were solved, and thus cannot be changed.

2.   For a surface average, select the surface(s) on which to calculate the moments in the Surfaces list.

3.   For a volume average, select the volume(s) in which to calculate the moments in the Cell Zones list.

4.   Click Print to display the moment values in the console window.

5.   To save the moment calculations to a file, click Write... and enter the appropriate information in the resulting Select File dialog box. The file extension should be .pb.