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Fig. 4 | Frontiers in Zoology

Fig. 4

From: Tree frog attachment: mechanisms, challenges, and perspectives

Fig. 4

Hydrodynamic (A) adhesion and (B) friction (1) during the schematic interaction between a toe pad (green) and the substrate based on displacement-induced flow of mucus (blue) and (2) in a model of the contact of two flat and rigid (cylindrical) plates. A area, dg gap width, F,hyd hydrodynamic adhesion, F,hyd hydrodynamic friction, rp plate radius, u flow speed, v detachment speed, v sliding speed, y spatial coordinate normal to the substrate, μ viscosity

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