Source: cirosantilli/divergence
= Divergence
{title2=$\div{}$}
{title2=$div()$}
{wiki}
Takes a <vector (mathematics)> field as input and produces a scalar field.
Mnemonic: it gives out the amount of fluid that is going in or out of a given volume per unit of time.
Therefore, if you take a cubic volume:
* the input has to be the 6 flows across each face, therefore 3 derivatives
* the output is the variation of the quantity of fluid, and therefore a scalar