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Lagrangian dynamics of solid particles in quantum turbulence

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Quantum turbulence – thermal counterflow of superfluid 4He – is investigated at length scales comparable to the average distance between quantized vortices. The trajectories of micrometer-sized deuterium particles are obtained in a planar section of the experimental volume by using the particle tracking velocimetry technique. The corresponding lagrangian velocities and accelerations are here discussed in order to specifically shed light on the similarities and differences between classical and superfluid turbulence.

Author(s):

Marco La Mantia    
Faculty of Mathematics and Physics, Charles University, Prague
Czech Republic

Daniel Duda    
Faculty of Mathematics and Physics, Charles University, Prague
Czech Republic

Miloš Rotter    
Faculty of Mathematics and Physics, Charles University, Prague
Czech Republic

Ladislav Skrbek    
Faculty of Mathematics and Physics, Charles University, Prague
Czech Republic