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Publikováno v:
Extreme Mechanics Letters. 38:100746
The seeds of Pelargonium species possess a long slender appendage called an awn, which enables self-burial of the seeds into soil by helically coiling in response to environmental humidity change. Here we analyze morphology of the helix formed by the
Publikováno v:
Physics of Fluids. 29:041702
We present quantitative measurements and mat hematical analysis of the granular drag reduction by rotation, as motivated by the digging of Erodium and Pelargonium seeds. The seeds create a motion to dig into soil before germination using their moistu
Publikováno v:
Physics of Fluids; 2017, Vol. 29 Issue 4, p1-4, 4p, 2 Diagrams, 2 Graphs