Intelligent Combination of Sump Model Study with CFD Analysis

This paper presents an innovative approach to optimising the design validation and construction timeline of a stormwater pumping station. Traditionally, validation of sump designs involves witnessed Froude scale model studies conducted by ANSI/ HI 9.8 standards, requiring approximately 16 weeks for analysis and recommendations. Subsequent civil construction design and groundwork activities typically extend the timeline to about 40 weeks. In this project, a Computational Fluid Dynamics (CFD) analysis was introduced early to assess sump flow behaviour for both the original and modified designs. This proactive step, although not part of the original scope, allowed the civil construction design to begin ahead of physical model results, with later comparison confirming alignment between CFD and physical study findings. The strategy synchronised design completion with the end of the monsoon season, offering the contractor a continuous 8-month dry period for execution. This integration of CFD led to a time saving of nearly 13 weeks and reduced overall project costs, demonstrating the practical benefits of advanced simulation in infrastructure development. Major Findings: The intelligent integration of CFD analysis with Froude scale model testing significantly reduced the design validation timeline by approximately 13 weeks. The CFD simulations successfully identified critical hydraulic issues such as swirl and vortex formation, enabling early design refinements. This dual-approach ensured design compliance with HIS standards while optimising the overall construction schedule and cost-efficiency.