Divergence

In vector calculus, the divergence is an operator that measures a vector field's tendency to originate from or converge upon a given point. For instance, for a vector field that denotes the velocity of water flowing in a draining bathtub, the divergence would have a negative value over the drain because the water vanishes there (if we only consider two dimensions); away from the drain the divergence would be zero, since there are no other sinks or sources.

Related Topics:
Vector calculus - Vector field - Tendency - Velocity - Bathtub - Dimension

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A vector field which has zero divergence everywhere is called solenoidal.

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