The conservation of mass flow rate states that the total amount of mass entering and leaving a system must be equal over time.
Reynolds Number: Reynolds number is used to determine whether fluid flow is laminar (smooth) or turbulent (chaotic). It depends on factors like viscosity, density, velocity, and characteristic length.
Poiseuille's Law: Poiseuille's law describes the flow of a viscous fluid through a cylindrical pipe. It relates flow rate to pressure difference, viscosity, and dimensions of the pipe.