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1. Tracer problem
There are three aspects to the tracer problem.
A tracer is a foreign body present in the fluid to be analyzed; it may sometimes be naturally present (dust or condensation mist in air, bubbles in water), but is most often introduced artificially by the experimenter. The seeding operation must therefore be non-disturbing if the non-intrusive nature of the visualization is to be preserved. The principle adopted must therefore comply with strict rules: the obstacle constituted by an...
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Tracer problem
Traditional methods
