Pressure Gradient Caused by Quantized Vortex in Superfluid Helium

Publisher Summary This chapter illustrates that a great deal of experimental and theoretical studies on superfluid turbulence have been performed. However, the chapter investigates the influence of the vortex line on pressure dissipation This chapter measures the temperature difference and the pressure difference through He II in a capillary glass tube. It calculates the quantized vortex line density from the temperature difference data using the numerical scaling coefficients. The pressure difference data give the information of interaction between the vortex line and the tube wall. The pressure dissipation caused by the vortex line is only one tenth of mutual friction between the vortex line and the normalfluid. In the terms of eddy viscosity for superfluid velocity field, it calculates the coefficient of the interaction between the vortex line and the superfluid.