Computational Log File

[SaraA]

Hello,

I am reading the 2D’s modelling User Manual and I have doubts in how is computing the volume accounting check of the example.

Here, it is in the image of page 4.9 (Chapter 4 Running the Combined 1D/2D Unsteady Flow Model), and the explanation coming after.

As shown in Figure 4-3, the volume accounting is shown for the entire model first, then for each individual 2D Flow Area. Volumes are shown in Acree-feet for all elements. The example in Figure 4-3 shows that the overall model lost 4.13 acree-feet of water, which equated to 0.011% volume error (very low). The separate 2D Flow Area had a flow gain of 0.26 acree feet, which equated to 0.0075% volume error (even lower).

Someone could explain me where these values of 4.13 and 0.26 are coming?

Thanks in advance,

Sara

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