👉 In the context of fluid dynamics, "fluid" refers to a substance that can flow and take the shape of its container. This includes liquids and gases, which are characterized by their ability to move and change volume under the influence of external forces like gravity or pressure. Liquids are incompressible, meaning their volume remains relatively constant even when pressure changes, while gases are highly compressible, with their volume changing significantly under similar conditions. Understanding fluid behavior is crucial in various fields, from engineering and physics to meteorology and environmental science, as it helps explain phenomena such as water flow in pipes, atmospheric circulation, and ocean currents.
