Many professors create custom PDF walkthroughs for their fluid mechanics or hydraulics classes. A quick Google search using the specific filetype command works best here.
Mastery of Water Distribution Modeling: A Guide to WaterCAD V8i
This was the climax. The PDF explained how to run a "Fire Flow Analysis." Elias watched the screen as the software simulated a massive blaze at the end of a cul-de-sac. The pipes turned red—a warning. The pressure was dropping too low.