EXPERIMENTAL STUDY OF FLOW AND MIXING CHARACTERISTICS IN THE S-CURVED CHANNEL

摘要

Laboratory experiments were conducted to investigate characteristics of both velocity field and concentration field in the meandering channel. The S-curved channel has been built considering river morphology and previous experimental studies. The micro-ADV was used to measure three-dimensional velocity field. The electrode conductivity meter was used to obtain tracer concentration. Results of experiments show that the maximum velocity of the primary flow occurs near the inner bank in a bend taking the shortest course along the channel. For the secondary flow, complex flow pattern appeared compared to experimental results in U-curved channel. Throughout the tracer test, the meaningful concentration versus time data could be obtained.