Accession Number:

AD0285385

Title:

USE OF ELECTROCHEMILUMINESCENCE FOR VISUALIZING FIELDS OF FLOW

Descriptive Note:

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS

Report Date:

1962-09-21

Pagination or Media Count:

28.0

Abstract:

A platinum hydrofoil is immersed in a flowing, alka ine solution containing luminol 5-amino2,3-dihydro-1,4-phthalazinedione and H2O2. Anodic current, replacing the usual chemical catalysis, generates a bright surface glow with intensity distribution controlled by mass transfer. This displays the flow at the boundary layer without disturbing it. A methanolic solution shows also the flow behind the hydrofoil the luminescence leaves the anode and extends downstream for a distance determined by the acidity. The subsequent history of parcels of fluid passing by any part of the hydrofoil can thus be traced. Fluid may be recirculated operation with organic solvents of low kinematic viscosity is possible. Laminar and turbulent boundary layers, various wakes, and vortex streets are illustrated. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE