Area Times Speed Gives Flow - Biophysical Continuum Mechanics and Viscoelastic Flow Step by Step

Average speed through a checked area produces a checked flow rate. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Bind area and average speed

The channel area is 3 square metres and the average speed is 4 m/s.

3\ \text{square metres}\quad4\ \text{m/s}

Area times speed gives flow rate

The volumetric flow rate is 12 cubic metres per second.

3\cdot4=12\ \text{cubic metres per second}