ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Electrodiffusion Diagnostics of the Near-Wall Flows

J. Tihon

Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, CZ-165 02 Prague

E-mail: tihon@icpf.cas.cz

Received: 23 April 2001

Abstract: The electrodiffusion method has been used to investigate the structure of near-wall turbulence. Two techniques recently used for fabrication of the multi-segment electrodiffusion probes are presented. The measurements performed in two experimental channel flows have demonstrated the application of such directionally sensitive probes under unsteady flow conditions. The traditional three-segment electrode provided valuable information on the recirculating flow structure behind a backward-facing step. The microelectrodes prepared by the new photolithography technique have been used to assess the influence of high polymer additives on spatial and temporal correlations of the flow fluctuations close to the wall.

Full paper in Portable Document Format: 561a45.pdf

Chemical Papers 56 (1) 45–51 (2002)