Turbulent temperature measurements in water

Abstract eng:
The fluctuating temperature field in a heated turbulent boundary layer is investigated. The working fluid is water, which is shown to have implications on the measurement devices, which typically are optimized for operation in air. A novel nano-scale temperature sensor, previously utilized in air, is redesigned for water measurements with a bandwidth of up to 1 MHz and spatial resolution more than an order of magnitude better than conventional sensors. The new sensor enables a detailed study of both mean and fluctuating temperature profiles in the boundary layer, as well as the turbulent heat fluxes when combined with velocity measurements.

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