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oai:figshare.com:article/32639856 2026-10-01T16:36:28Z portal_1172 item_type_8 month_year_10_2026

Physical and computational fluid dynamic modelling of the hydrodynamics of the flow regime within a storm drainage vortex flow control device Muhammad Shahzaib Choudhry (24168918) PUREID: 604507426 The Vortex Flow Control (VFC) device is an environmentally friendly solution that reduces the risk of flooding, a crucial function in the context of climate change. The device's performance is defined by three phases: Initiation, Transition, and Vortex. Understanding the flow regime during these phases is key to optimizing the device.<br><br>The Transition Phase (TP) is particularly significant, as high peripheral velocities create chaotic flow movements until the vortex stabilizes, forming an air core that restricts the outflow. This study presents both physical and Computational Fluid Dynamic (CFD) modelling of hydrodynamics within a storm drainage VFC device.<br><br>For the experiments, an industrial-scale VFC device made of acrylic was used for its optical clarity, allowing image analysis to capture the internal flow regime. The outlet configurations were altered to study their impact on the device’s performance. Particle Image Velocimetry (PIV) experimentation, conducted with a Dantec Dynamic laser system, helped analyses flow magnitude and direction.<br><br>Chapters 4 and 5 discuss the intelligence extracted from the experimental data using dynamic studio software, offering suggestions for optimizing the VFC device. Numerical studies employed the Volume of Fluid (VOF) method, with Reynolds-Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES) modelling, detailed in chapter 6.<br><br>Performance curves from the numerical models were compared with experimental data, determining which model best matched the experimental results. The velocity field obtained from PIV experimentation was compared with numerical data, with discussions and suggestions presented in chapter 7.<br><br>Overall, the numerical models accurately predicted the experimental measurements, providing a reliable methodology for investigating flow behaviour inside the VFC device.<br><br><i>Thesis is embargoed until 31 December 2027.</i><br> 2026-10-01T16:36:28Z Text Thesis 10.17034/32639856.v1 https://figshare.com/articles/thesis/Physical_and_computational_fluid_dynamic_modelling_of_the_hydrodynamics_of_the_flow_regime_within_a_storm_drainage_vortex_flow_control_device/32639856 All Rights Reserved Open Access after 2027-12-31