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Stripes in toothpaste

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angelamaber | 16:12 Tue 29th Jan 2002 | How it Works
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How do they get the toothpaste to come out of the tube in defined stripes?
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Avatar Image incitatus
The toothpaste is put in the tube in large stripes. Due to the viscosity of the toothpaste the tube is a low Reynolds-Number domain, so there is no turbulent flow to mix the stripes.
17:16 Tue 29th Jan 2002

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Stripes in toothpaste

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