On the Nonlinear Profile of the Heat Pulse in Liquid Helium II

抄録

Nonlinear profile of second sounds in liquid helium II was studied experimentally using heat pulse method. For a quantitative discussion the reductive perturbation method was applied to the Landau two fluid equations. The obtained Burgers equation together with known nonlinear coefficient of He II gives a good agreement with the observed results on the temperature shock front formation.