Viscosity of Helium Calculated by Using the Brake Theory of Viscosity

摘要

Liquid helium is an exciting subject for the study of thermodynamic and transport properties because of its remarkable properties. The viscosity of liquid helium exhibits the abnormal behavior compared to other ordinary liquid. Below the ￥? point liquid 4He becomes superfluid, and it is obviously quite a different phenomenon from the change of liquid 3He. The brake theory of viscosity proposed by authors is successfully applied to liquid 3He, liquid 4He, dense gas and 4He with adjustable parameter Vs. The calculation results are satisfactory compared with the observed values.