Abstract
We have measured the dissipation associated with superfluid turbulence in circular tubes for combined normal and superfluid flows spanning the ${V}_{n}$-${V}_{s}$ plane from pure superflow to thermal counterflow. For relatively small values of ${V}_{n}$ the dissipation is consistent with a homogeneous distribution of quantized vortex lines in the superfluid if it is assumed the lines are dragged by the normal-fluid flow. For larger values of ${V}_{n}$ this unified description is destroyed by the phenomenon associated with the TI-TII transition in thermal counterflow.
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