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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-483-0

ISBN Online: 978-1-56700-482-3

4th Thermal and Fluids Engineering Conference
April, 14–17, 2019 , Las Vegas, NV, USA

SIMULATING AND MINIMIZING BACK AND BOTTOM WALL VORTICES FOR SUMP PUMPS

Get access (open in a dialog) pages 871-881
DOI: 10.1615/TFEC2019.fip.028049

摘要

This study was performed to attempt to simulate vortices formed in a sump pumping application using the Computational Fluid Dynamics (CFD) package ANSYS Fluent. The simulation was based on previously obtained experimental results where vortices were visually observed and assigned a numerical magnitude. The results of the previous experimental study show constant vortex formation on the back wall and bottom face of the fluid domain and intermittent formation on the free surface. The back wall and bottom face vortices were used as validation cases for this simulation with the free surface results being given for reference.

A baseline simulation was performed to match the experimental results and to be used to compare parametric studies and the simulation is provided qualitatively accurate solutions. The parametric studies performed were to analyze the effects of moving the sump pump pipe horizontally and vertically in the fluid domain, and to analyze the effects of changing the pipe bell geometry. After the parametric studies, an optimized location simulation was performed in which the location of the pipe bell was changed based on the results of the parametric study to determine an area in the fluid domain where the back and bottom vortex formation would be minimized.

The results of the simulations performed were that the vortex formation was indeed dependent on the location of the pipe bell, but did not appear to have a dependency on the pipe bell radius as originally hypothesized. The optimized location study also showed minimized vortex activity with respect to the baseline simulation on the back wall and bottom faces of the fluid domain as well as the pump intake.