👉 A phase fluid, also known as a fluid phase or liquid phase, is a substance that exists in one of the three primary states of matter: solid, liquid, or gas, but not as a homogeneous mixture. In this state, the molecules are closely packed together, allowing them to move past each other but still maintain a degree of cohesion due to intermolecular forces. Phase fluids are characterized by their distinct properties and behaviors, such as viscosity, surface tension, and density, which can vary with temperature and pressure. Examples include water in its liquid form, oil in its liquid state, and carbon dioxide in its liquid or supercritical phase under specific conditions. These fluids play crucial roles in various natural processes and industrial applications, from weather patterns to chemical reactions.
