Engineers want to avoid chaos because it is unpredictable and can lead to catastophic failure. An example is a chemical factory in India that exploded because the engineer in charge did not understand the chaotic nature of the chemical processes. Every day at least once, the mail vans collect mail from all the mailboxes in Boulder. That's a lot of gas and a lot of time. You could be the person to decide the route.
Large ships carry cargo around the world.
There could be a lot of different types of cargo all different sizes, all different weights and all on the same ship. It could be your job to decide how that ship is loaded. It could be your job to decide the schedule for a fleet of ships, which ports they visit and when. Think about all the airplanes carrying passengers and cargo all over the world everyday. Fluid Dynamics Fluid dynamics is essential to understanding the atmosphere and the ocean.