👉 Fluid, often referred to as a fluid interface or a liquid interface, is a concept in physics and engineering that describes the behavior of two immiscible fluids in contact with each other, such as oil and water. The fluid's surface tension acts to minimize its area, leading to unique phenomena like droplets forming spheres, which naturally reduce the surface area exposed to the surrounding fluid. This property is crucial in various applications, including the design of microfluidic devices, oil recovery techniques, and even biological processes like cell membrane dynamics. Understanding fluid fluid allows for better control and manipulation of these interfaces, enhancing efficiency in industrial processes and scientific research.