Schematics of wake behind a sphere moving from right to left in quantum liquid He-II (IMAGE)

Osaka Metropolitan University

Schematics of wake behind a sphere moving from right to left in quantum liquid He-II

Caption

(Upper) Drag is zero without quantum vortices at T = 0. (Lower) Coarse-grained quantum vortices can reproduce the prediction of the Reynolds similitude by forming a turbulent wake with high Reynolds number defined with the quantum viscosity. The inset represents a microscopic view of quantum vortices in the turbulent wake.

Credit

Hiromitsu Takeuchi, Osaka Metropolitan University

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