We present experimental data on decaying turbulence generated by towing a grid of crossed tines through a stationary sample of He II. The present data were obtained using a grid of substantially improved design from that used in previous investigations of grid generated superfluid turbulence. An important preliminary observation is that both the magnitude and temperature dependence of the effective kinematic viscosity of the turbulence - deduced from measurements of the attenuation of second sound as a function of time - are not substantially altered by details of the grid used to generate the turbulent flow.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- Condensed Matter Physics