STUDY ON SECONDARY CURRENTS IN OPEN-CHANNEL FLOWS BY USING 3-D LDA MEASUREMENTS
نویسندگان
چکیده
منابع مشابه
Mechanism of secondary currents in open channel flows
This paper describes the conditions for initiation and maintenance of secondary currents in open channel flows. By analyzing the Reynolds equation in the wall-normal and wall-tangent directions, this study reveals that, like other types of vortices, the secondary currents are originated in the near-boundary region, and the magnitude (or strength) of secondary flow is proportional to the lateral...
متن کاملan investigation of the influence of longitudinal channel slope on secondary currents in compound channels using 2 d momentum model
secondary flow investigation could be regarded as an important issue in open channel flow, in spite of its lower quantity compared to the base flow in the water course. it should be given special consideration because of the influence on some hydraulic factors in open channel, specifically in compound channels. in compound channels' due to the difference in the flow velocity of the main ch...
متن کاملJets Opposing Turbidity Currents and Open Channel Flows
Hydraulic jumps at the tail end of spillways are usually induced by baffle blocks or other obstacles. Such jumps can also be induced by jets that oppose the main flow. Another application is to back up turbidity currents in reservoirs by means of opposing jets. This measure can be adopted when transfer tunnels feed water into the reservoir at a higher elevation near the dam. Stopping the turbid...
متن کاملUnsteady air–water flow measurements in sudden open channel flows
Measurements of air–water flow properties are reasonably simple in steady flows, but not so in unsteady flows. Some studies investigated periodic flows in which instantaneous data were averaged over several cycles. During the present work, new unsteady air–water flow measurements were performed in sudden open channel flow surges. Unsteady air–water flow measurements were performed in the wave f...
متن کاملElectrical Resistance Tomography for Suspended Sediment Measurements in Open Channel Flows Using a Novel Sensor Design
Electrical Resistance tomography (ERT) has been previously employed to measure sediment concentrations in liquids (Bolton et al. [1], James et al. [2], Qiu et al. [3]), and linear sensors were the first type of sensor employed in previous tomographic applications (Qiu et al. [4]). However, ERT has mostly been used in cylindrical vessels or pipes with a circular sensor around the area of interes...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: PROCEEDINGS OF HYDRAULIC ENGINEERING
سال: 2000
ISSN: 0916-7374,1884-9172
DOI: 10.2208/prohe.44.449