Numerical study on flow structure around the rectangular aqueduct

Flow characteristics of the rectangular aqueduct was numerically studied using two-dimensional unsteady Reynolds averaged incompressible Navier-Stokes equations combined with the RNG (renormalization group) k-ε turbulence model. Two situations are considered including empty and full depth of the aqueduct. Quadrilateral grid was used to divide the computational domain. The finite volume technique was adopted to discretize the governing differential equations. The pressure-velocity field was coupled using the SIMPLE algorithm. The reason why wind load shape coefficients are very close under previous two conditions is explained by introducing the research results of driven cavity flows. Also we obtain the vortex structure in the aqueduct for empty condition.