Article Dans Une Revue International Communications in Heat and Mass Transfer Année : 2025

Generalized theory for wall shear stress measurement using circular-segment electrodiffusion probes

Vaclav Harrandt
  • Fonction : Auteur
Yaroslav Bazaikin
  • Fonction : Auteur
Jaroslav Tihon
  • Fonction : Auteur
Jaromir Havlica

Résumé

The present work establishes a new theoretical framework for wall shear stress measurements with electrodiffusion probes composed of circular segments, a generalization of the theory previously derived for twin semicircular probes. This newly proposed probe design extends the capabilities of near-wall flow measurements and provides deeper insights into boundary layer behavior. By deriving analytical formulas for the mass transfer coefficients, the study quantifies how the probe geometry and fluid flow direction affect mass transfer to each segment of the probe. A numerical solution of the convection–diffusion equation confirms the validity of these analytical formulas. In addition, a practical methodology for evaluating experimental measurements is presented that allows the electrical currents collected by the probe to be converted into a wall shear stress vector. The influence of the insulation gap position on diagnostic performance is also discussed, highlighting how different probe geometries can refine the sensitivity and accuracy of the measurement. Overall, the proposed approach broadens the possibilities of electrodiffusion-based measurements, allowing for a more versatile and detailed characterization of near-wall transport phenomena.

Fichier non déposé

Dates et versions

hal-05365763 , version 1 (14-11-2025)

Identifiants

Citer

Vaclav Harrandt, Yaroslav Bazaikin, Florian Huchet, Jaroslav Tihon, Jaromir Havlica. Generalized theory for wall shear stress measurement using circular-segment electrodiffusion probes. International Communications in Heat and Mass Transfer, 2025, 167, pp.109322. ⟨10.1016/j.icheatmasstransfer.2025.109322⟩. ⟨hal-05365763⟩
24 Consultations
0 Téléchargements

Altmetric

Partager

  • More