Laboratory investigation of stratified flows in strongly curved flumes

The dynamic mechanism of stratified shear flows in strongly curved flumes was experimentally studied.Three physical models,with straight flume and strongly curved flumes with 90°and 180°bend,were set up respectively.Two-layer flows with different velocity and temperature were produced by using the two independent inflow systems sets.In this experiment investigation,the different flow statuses from the obvious stratified flow to strongly entrainment were studied under the different velocity ratio between upper layer and lower layer.The distribution of velocities,temperatures,turbulent kinetic energy and the Reynolds stress and transect secondary flow were systemically measured and presented with some equipments such as ADV,infrared thermograph and digital thermometer,etc.The dynamic characteristic of stratified flows in curved flumes was revealed and compared with that in straight flume simultaneously.