開水路流れにおける濃度変動場の伝播特性

Abstract

This paper deals with the transfer process of concentration fluctuations of the tracer injected asa point source in open-channel flows. The constitution of c'2 ec equations, which is quite similarto k-e model, will be shown with taking account of the production and dissipation term of ecequation from hydraulic point of view. The transverse and longitudinal distributions of c'2 arederived numerically using c'2 ec equations and compared with the experimental results to identifythe mathematical form of the production term of ec equation. The existence of -5/3 power lawfor the spectrum of concentration fluctuations is also verified experimentally.