1 Introduction and Approach Measuring turbulent fluctuations using hot-wire anemometry is still the method that provides the highest degree of accuracy, in particular when it comes to temporal and spatial resolution. The question of spatial resolution of hot-wires has been treated in the past in a number of publications [1], and corresponding correction schemes, both heuristic [2] and data-driven [3], have been suggested. Nonetheless, there are still unresolved open questions in wall turbulence, such as the proper scaling of the near-wall and secondary peak (or even its existence) in the variance profile of the streamwise velocity component or the scaling behaviour of its higher-order moments [4]. While the effect of temporal and spatial resolution on these quantities has been investigated in a number of studies it was only very recently that the effect of temperature fluctuations-as they are e.g. encountered in non-isothermal flows-on the mean, variance and spectra in wall-bounded turbulent flows when utilising hot-wire anemometry has been documented and corrections were proposed [5].
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