👉 An ideal fluid is a substance that exhibits the simplest form of viscosity, meaning it flows with minimal resistance when subjected to an external force. It is characterized by its ability to smoothly transition between liquid and gas phases under varying temperatures and pressures, without significant energy loss due to internal friction. In practical terms, an ideal fluid has a low viscosity, allowing it to flow easily and maintain its shape under minimal pressure. Examples include water at room temperature and certain gases like helium, which demonstrate these properties effectively. This fluid behavior is crucial in many engineering applications, from lubrication to aerodynamics, where minimizing resistance and maximizing efficiency are paramount.
