Two-phase flow refers to the simultaneous movement of two distinct phases, typically a liquid and a gas, within a system. This phenomenon is commonly observed in various applications, such as in oil and gas extraction, chemical processing, and heat exchangers. Understanding how these phases interact is crucial for optimizing performance and efficiency in these systems. In two-phase flow, the behavior of each phase can significantly affect the overall flow characteristics. Factors like pressure, temperature, and flow rates influence how the phases mix and separate. Engineers and scientists study these interactions to improve designs and predict system behavior under different operating conditions.