TURBULENCE MODIFICATION DUE TO WAVE ACTION AT LOW REYNOLDS NUMBERS IN HORIZONTAL OPEN-CHANNEL FLOW

摘要

Wave-turbulence interaction was experimentally in- vestigated in turbulent open-channel flows with a shear- free wavy surface using a photochromic dye activation technique. In the experiments conducted, two-dimensional waves of different amplitudes, wavelengths, and frequen- cies were superimposed on a liquid surface via a mechanical wave maker.