👉 A simple fluid is a substance that flows easily and smoothly without any significant internal resistance, meaning it can move freely and change shape to fit its container. Examples include water, oil, and air. These fluids have low viscosity, which means they flow easily, and they can be easily compressed under pressure. Unlike gases, simple fluids do not have a fixed volume but will take the shape of their container, making them essential for processes like lubrication, transportation, and various industrial applications.
