👉 A plate fluid, also known as a thin film fluid, is a type of fluid that flows in extremely narrow channels or films, typically on the order of micrometers to millimeters thick. These fluids exhibit unique properties due to their confinement within these thin layers, leading to phenomena like enhanced viscosity and altered flow behavior compared to bulk fluids. Plate fluids are commonly used in microfluidic devices, where their predictable and controllable flow characteristics enable precise manipulation of small volumes of liquid for applications in chemical analysis, biological assays, and lab-on-a-chip technologies.