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In this paper, we report the first evidence of an enhancement of the heattransfer from a heated wire by an external turbulent flow of superfluid helium.We used a standard Pt-Rh hot-wire anemometer and overheat it up to 21 K in apressurized liquid helium turbulent round jet at temperatures between 1.9 K and2.12 K. The null-velocity response of the sensor can be satisfactorily modeledby the counter flow mechanism while the extra cooling produced by the forcedconvection is found to scale similarly as the corresponding extra cooling inclassical fluids. We propose a preliminary analysis of the response of thesensor and show that -contrary to a common assumption- such sensor can be usedto probe local velocity in turbulent superfluid helium.

Heat transfer enhancement on thin wires in superfluid helium forced flows