Conference Proceedings

Correcting hotwire misalignment errors for wall-bounded turbulence measurements

Rahul Deshpande, Jason Monty, Ivan Marusic

11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019 | Darmstadt University of Technology | Published : 2019

Abstract

In case of wall-bounded flows, the lateral velocity fluctuations measured via hotwire anemometry (e.g. X-probes) are extremely sensitive to calibration of the multi-wire probe. In the present study, we propose a scheme to correct these velocity statistics which are rendered inaccurate due to misalignments during probe calibration. The method is based on the well accepted argument that the viscous-scaled small-scale turbulence energy is invariant with Reynolds number. The scheme is shown to work well for data acquired using X-probes of varying measuring volumeand across a decade of Reτ .