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1. Create a new part representing the volume of fluid that surrounds the object (or the encapsulating foam), and the shrinkwrap part that represents your assembly. Follow the guidelines established by your CFD software and conventional methodology to correctly size the volume. If you are doing packaging, be sure to add any desired features to the shrinkwrap part before continuing. Note that, more often than not, you will want an auto-hole-fill shrinkwrap part for packaging cut outs, but either version will do for an external flow analysis (Fig. 19).
Figure 19. (click to enlarge)
2. Create a new assembly, and assemble both the control volume part (or foam if doing packaging) and the shrinkwrap part of your assembly. If you are doing multiple parts, assemble the multiple occurrences (Figs. 20 and 21).
Figure 20. (click to enlarge)
Figure 21. (click to enlarge)
3. Select Component, Adv Utils, Cut Out (Fig. 22).
Figure 22.
4. Select the parts to perform the cutouts to (the fluid part or encapsulating foam) and choose Done Sel.
5. Select the parts to use as the cutouts to (the shrinkwrap part(s)) and choose Done Sel, Done.
6. When prompted about supporting associative placement for the feature, click Yes. At this point, the cutout feature is created in the foam or fluid volume. Now either the part or the assembly (if the cutout part is suppressed) can be used for the analysis (Figs. 23 to 25).
Figure 23. (click to enlarge)
Figure 24. (click to enlarge)
Figure 25. (click to enlarge)
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