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Information × Registration Number 0215U009322, 0115U003846 , R & D reports Title Bulk and surface mesoscopic objects in condensed phases of helium popup.stage_title Head Sharapova Iryna Volodymyrivna, Registration Date 23-12-2015 Organization B.I.Verkin Institute for Low Temperature Physics and Engineering of National Academy of Sciences of Ukraine popup.description2 An experimental study is made of the drag coefficient which is the characteristics of energy dissipation during oscillations of the tuning forks, immersed in liquid helium in the temperature range from 3,5 to 0,08 K. It is found that at temperatures above 0,7 K the drag coefficient depends on oscillating frequency of fork and viscous of the fluid. At temperatures below 0,7 K the drag coefficient depends on density of the normal component of He II. At the same time in the entire range of temperatures value of dissipative losses depends on the geometry of the oscillating body. The study of the transition between laminar and turbulent flow of superfluid helium at 0,2 K were carried out. The quasistable regime of laminar flow was observed in a limited range of velocities of superfluid helium. The observed quasistable regime is under further study. Product Description popup.authors Бахвалова Валерія Анатоліївна Гриценко Іван Анатолійович Шарапова Ірина Володимирівна popup.nrat_date 2020-04-02 Close