Study on the 3D Hydrodynamic Characteristics and Velocity Uniformity of a Gravity Flow Circular Flume

Flumes have been widely used in water conservancy science and environmental research. It is of great significance to obtain the hydrodynamic characteristics flow field uniformity flume. In this study, a new type annular flume was taken as an example. The 3D simulated by using commercial computational fluid dynamics (CFD) code, also measured acoustic doppler velocimeter (ADV) verify simulation results. average relative error range between 8.37% 9.95%, results basically reflected actual situation field. On basis, structural were analyzed. A calculation method velocity presented according natural open channels. straight channel calculated analyzed based on method, influence speed further discussed. length uniform section negatively correlated with rotational (average velocity), which 39 cm 101 straight, coefficient less than 10%. Finally, without wheel compared flow. longitudinal well fitted Prandtl logarithmic distribution formula (R2 > 0.977), application feasibility This study can provide technical support for development