Abstract
A cylindrical electrodiffusion probe for the measurement of liquid velocity vectors in the plane perpendicular to its axis was developed as an analogue to the triple-split film thermoanemometer. The geometry of the probe enables high directional resolution in the whole range of 360°. The total mass transfer of the probe was well correlated by the relation Sh = 0.76 Sc 0.33 Re 0.47.
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Abbreviations
- A kj , B kj :
-
Fourier coefficient
- c [mol/m3]:
-
depolarizer concentration
- te]D [m2/s]:
-
diffusion coefficient of species
- d :
-
[m] diameter of probe
- f :
-
[1/s] frequency of vortex formation
- h :
-
[mol/m2s] coefficient of mass transfer
- I k :
-
normalized current of K-th segment
- i :
-
[A] total current
- i k :
-
[A] current of K-th segment
- Re :
-
Reynolds number, u d/v
- Sc :
-
Schmidt number, v/D
- Sh :
-
Sherwood number, h d/c D
- Sr :
-
Strouhal number, f d/v
- v :
-
[m/s] free stream velocity
- θ :
-
[°] flow angle, i.e. angle between approaching stream and reference direction of probe
- v :
-
[m2/s] kinematic viscosity
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Sobolík, V., Pauli, J. & Onken, U. Three-segment electrodiffusion probe for velocity measurements. Experiments in Fluids 11, 186–190 (1991). https://doi.org/10.1007/BF00190298
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DOI: https://doi.org/10.1007/BF00190298