2000 Volume 44 Pages 449-454
Three-dimensional measurements in an open-channel flow were conducted by making use of a 6-beams laser Doppler anemometer (LDA). All three components of instantaneous velocities were firstly measured in the cross section of an open-channel flow. The Reynolds stress term in the vorticity equation was succesefully measured with high accuracy. It was found that the Reynolds-stress term and the generation term in the vorticity equation balance with each other. The diffusion terms in the energy equation (∂(uuv)/∂y and ∂(uuw)/∂z) were also investigated in the cross section of open-channel flow and it was found that the distributions of diffusion terms are complicated.
