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Looking at the microworld with the naked eye

Looking at the microworld with the naked eye. Can the slow motion of something very tiny be similar to a quicker motion of something considerably larger?. Maciej Lisicki Maria Ekiel - Jeżewska. What does it mean 'similar'?. Identical shape is not enough.

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Looking at the microworld with the naked eye

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  1. Looking at the microworld with the naked eye Can the slow motion of something very tiny be similar to a quicker motion of something considerably larger? Maciej Lisicki Maria Ekiel - Jeżewska

  2. What does it mean 'similar'? Identical shape is not enough... http://www.tukan-webdesign.de/krusenstern2/Krusens%20neu%20als%20Taste%20m.Schatt400x383.jpg http://www.mmszczecin.pl/8307/2007/9/20/klub-czytelnika-zaprasza?category=interwencje

  3. Reynolds number L U ρ, μ Density and viscosity of the liquid Flow velocity Characteristic size

  4. Flow similarity principle Two flows having the same Reynolds numbers have the same character. = Low viscosity, little size, low velocities High viscosity, big size, high velocity

  5. Low viscosity + little objects Welcome to the microworld! Rhodobacter BACTERIA IN WATER E. coli Howard Berg’s Laboratory

  6. High viscosity + large objects MACROWORLD MICROWORLD Re

  7. Flows with similar Reynolds numbers are similar! Instead of looking at swimming microobjects, we can observe large bodies but in a Very Viscous Liquid!

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