![]() Irrotational means it travels in straight lines rotational means it swirls.įor most of the rest of the chapter, we'll focus on irrotational, incompressible, steady streamline non-viscous flow. This is the big difference between liquids and gases, because liquids are generally incompressible, meaning that they don't change volume much in response to a pressure change gases are compressible, and will change volume in response to a change in pressure.įluid can be viscous (pours slowly) or non-viscous (pours easily).įluid flow can be rotational or irrotational. The density of the streamlines increases as the velocity increases.įluids can be compressible or incompressible. In steady flow, the motion can be represented with streamlines showing the direction the water flows in different areas. For turbulent flow, the speed and or the direction of the flow varies. In steady flow, the fluid passing a given point maintains a steady velocity. This can get very complicated, so we'll focus on one simple case, but we should briefly mention the different categories of fluid flow.įluids can flow steadily, or be turbulent. Fluid dynamics and Bernoulli's equation Fluid dynamics and Bernoulli's equationįluid dynamics is the study of how fluids behave when they're in motion.
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