Diffusion of point source pollution at the cross joint

Abstract The cross joint is one of the standard connection types for urban water supply pipelines. A pipeline containing joints was taken as research object using NaCl tracer. turbulent mixing characteristics and pollutants at pollutant migration diffusion were studied analysed by numerical analysis experimental measurement. primary purpose to check comprehensive influence six factors pipe diameter, inlet flow ratio, outlet location damage point, brine, density brine on in pipeline. coefficient variation used an evaluation index evaluate pipeline, effective length LEML quantify uniform position results show that diameter significantly affect east joint. Outlet ratio joint's south direction. In addition, dimensionless relationship equation representing fitted through dimensional analysis.