Abstract
The flow in a pump sump is a very complicated one, which has three dimensional flow patterns, deformed free surface, and many unsteady vortices. As the model testing has a problem of similarity, CFD simulation method attracts attention in these days. In this study, a model case flow in the pump sump with simplified shape is simulated numerically. The flow is simulated as three-dimensional with free surface. Using k-epsilon model and LES model, the result is compared each other and also compared with an experiment. The LES result shows more similar flow to the experiment, but the continuous air-entraining vortex cannot be reproduced by simulation. To identify the sump vortex, the swirl function and helicity are better than the vorticity.
