Frequency response of an electrochemical probe to the wall shear stress fluctuations of a turbulent channel flow

Experimental study and CFD modelling of a two-phase slug flow for an airlift tubular membrane

“…For laminar flow conditions, the friction factor is equivalent to 64 / Re. The shear probes used in the present study are expected to be able to capture rapid changes in surface shear stresses caused by the passage of gas slugs (Gradeck and Lebouché, 1998;Pallares and Grau, 2008). For the experimental conditions investigated, the fastest changes in shear measurements were observed to occur over a period of approximately 100 ms (i.e.…”

A review of turbulence measurement techniques for flotation

“…This method has shown its advantages in application of studying flow fluctuations in a confined transition flow. In their research, Pallares and Grau (2008) predicted numerically the response of an electrochemical probe to harmonic and turbulent wall shear stress. It was found that there was differences between the response of the probe to the turbulent fluctuations and to the low-amplitude harmonic fluctuations, which could be explained from the different amplitude and spectral characteristics of the two classes of fluctuations.…”

“…,Bakker et al (2009,Meng et al (2014a,b) Electrochemical probe Converts the change in the speed of a chemical reaction to a fluctuating electrical signal which can be related to turbulence intensityDeslouis et al (1993),Pallares and Grau (2008), AitMouheb et al (2013) Constant temperature anemometer(CTA)…”