  Numerical calculations of Helium-II hydrodynamics show that a dense tangle of
superfluid vortices induces in an initially stationary normal fluid a highly
dissipative, complex, vortical flow pattern ("turbulence") with a -2.2 energy
spectrum scaling exponent and fluctuations Reynolds number of order unity. In
this normal fluid flow the effects of mutual friction excitation from the
superfluid vortices and those of viscous stresses are of the same order. The
results suggest that in previous experiments the dynamics of decaying, high
Reynolds number, quantum turbulent flows could only weakly be affected by the
quantized vortices. As a consequence, their energy spectra would be (to a very
good approximation) the classical, Navier-Stokes type, energy spectra of the
normal fluid component.
