👉 Fluid, in the context of fluid dynamics, refers to a state of matter that exhibits properties of both liquids and gases. It has a variable density and can flow like a liquid while also compressing like a gas. At the molecular level, fluid consists of particles that are in constant motion, colliding with each other and the walls of their container. The fluid's behavior is governed by factors such as temperature, pressure, and the intermolecular forces between its particles. When a fluid is subjected to external forces, it can change its state or flow in various ways, such as laminar or turbulent flow. Understanding fluid dynamics is crucial for applications ranging from engineering and physics to meteorology and biology, as it helps explain phenomena like ocean currents, weather patterns, and blood flow in the human body.
