The Effect of Prey Surface Roughness on the Viscous Adhesion Force of Frog Saliva Public
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The frog uses wet adhesion and a soft tongue in order to capture its prey. This swift capture, unmatched by known synthetic mechanisms, benefits from being understood in its totality. The adhesion is due to a frog’s shear thinning saliva, which can be treated as a high viscosity Newtonian fluid under low shear stress and a low viscosity Newtonian fluid under high shear stress. With shear forces playing a large role, it follows that the texture of the surface could impact the adhesive strength of the tongue. An experiment was designed using dynamic similarity to determine the impact surface roughness has on the adhesive properties of the frog tongue. The experiments did not reveal any significant impact of surface roughness on the adhesive strength of the bond between tongue and prey.
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