Mass flow rate is the measure of the mass of a substance that passes through a given surface per unit time, typically expressed in kilograms per second (kg/s). This concept is crucial in understanding fluid motion and behavior, as it connects to the conservation of mass, ensuring that mass is neither created nor destroyed in a flowing system. It also plays a significant role in analyzing flow fields and stream functions, which help visualize the movement and distribution of fluids in various applications.
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