Interpreting the Bulk Calculator


I used the bulk calculator to measure a volumetric flow rate, and the value came back negative. What does this mean?

Here is a snippet of the values:


The interpretation is pretty straightforward: when the vectors are pointing OUT of the flow domain, the volumetric flow rate is negative:

If you invert the orientation of the cutting plane (so that the vectors are pointing IN), now the volumetric flow rate will show as a positive number:


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