Title
Quantum Turbulence:Decay of Grid Turbulence in a Dissipationless Fluid: Kelvin wave cascade theory, magnetically shielded superc,Used
Delivery time: 8-12 business days (International)
QUANTUM TURBULENCE : DECAY OF GRID TURBULENCE IN A DISSIPATIONLESS FLUID We produced grid turbulence in liquid helium at 520 mK to compare with classical experiments and theories. Above T = 1 K, with viscosity present, it has been shown that grid turbulence is equivalent to homogeneous isotropic turbulence in a classical fluid. We seek to investigate the nature of grid turbulence when viscosity is zero. Specifically, in the absence of viscosity in a quantum fluid, through what path does the turbulence decay? To produce grid turbulence, a magnetically shielded superconducting linear motor was designed and built to accelerate and decelerate the grid rapidly in a short distance (~ 1 mm), and achieve glide speeds up to 1 m/s, when driven with the properly shaped current pulse. We measured the decay of the turbulence produced by calorimetry technique. Recent theory suggests the decay occurs through a Kelvinwave cascade on the vortex lines which couples the initially large turbulent eddies to the short wavelength phonon spectrum of the liquid, yielding a characteristic rate of temperature rise. Initial measurements support the Kelvin wave cascade theory.
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We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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