Experimental Determination of Solute Mixing in Pipe Joints

摘要: Solute mixing within water distribution systems is, in general, controlled by turbulent straight lengths of pipes as well partitioning the solute into different outlets at pipe junctions. Detailed experimental examination junctions conducted over past year shows that these does not follow often assumed rule complete and flowweighted outlet mass fractions. Experiments were using a salt solution in-line conductivity flow measurements to determine normalized fraction exiting pip is adjacent inlet carrying solution. Here, “Cross” with two meeting single point are examined. Parameters varied experiments include diameter, Reynolds numbers inputs outputs, proportions tracer ambient flowing joint. Results show largest deviations from flow-weighted assumption occur when flows nearly equal. Changing diameter increasing or decreasing all concert has relatively little effect on results. Mass-balance calculations result generally less than 3% error. When inlets quite different, results tend toward those predicted model.