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Module 1.2 · Topic 3
Module 1.2 · Topic 3
Given only the flow pattern, can you find where tracer is being added or removed?
Concentration describes how much tracer is present. It says nothing about the flow itself — and somewhere in this stream, tracer might be actively entering (a source, like a discharge pipe) or actively leaving (a sink, like absorption into sediment), visible only in how the flow behaves.
At a specific point, more fluid flows outward across a tiny surrounding boundary than flows inward. Does this tell you anything about whether that point is a source or a sink?
A positive divergence at a point in a flow field indicates:
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