Abstract
Experimental and theoretical investigations have been carried out on time dependent heat transfer in a pressurized He II channel, terminated by a copper rod. Heat flux is applied in the form of a sinusoidal wave. As the heat flux frequency increases, copper and He II temperatures converge with the values that are obtained when the effective value of heat flux is constantly applied. The Kapitza conductance is independent of the heat flux frequency, within the range from 0 to 40Hz. On the basis of the two fluid models combined with the heat conduction in copper and the Kapitza conductance at the He II-copper interface, a one dimensional heat transfer model has been developed, which can accurately predict the experimentally determined time dependent heat transfer characteristics.
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