Normalized representation for steady state heat transport in a channel containing He II covering pressure range up to 1.5 MPa

Publisher Summary This chapter investigates steady state heat transport through He II in wide channels. The exponent in the Gorter–Mellink equation is determined to be 3.4 from the data analysis. The thermal conductivity functions (TCF) are determined by using m = 3.4. The results in a wide range of pressure from saturated pressure to 1.5 MPa are represented uniquely by using the normalized TCF. Agreement with the Bon Maridon's result is quite good. This normalized equation will be used practically for the design of superfluid equipments. The physical meaning of m = 3.4 needs to be investigated in a future. Temperature gradients along the channel containing He II are measured in the temperature range from 1.4 K to 2.1 K. In the process of measurement error estimation, the largest error comes from the estimation of the inner diameter of the tube. Therefore, the diameter is measured precisely and the data are checked again to get a universal representation of the thermal conductivity functions.