Case Study: Aerodynamic Optimisation of Arion8 High-Speed Bike

Case Study: Aerodynamic Optimisation of Arion8 High-Speed Bike

By jameslinfield@hotmail.com Comment Closed
Competitive Aerodynamics for One of the Fastest Hand-Cycles Ever Built Client: University of Liverpool Velocipede (ULV) Team Sector: Aerodynamics / Sports Engineering Challenge The University of Liverpool Velocipede Team (ULV) embarked on Arion8, a next-generation hand-powered racing bike targeting new world records at the World Human Powered Speed Challenge (WHPSC) 2025. ULV has a proven pedigree in this category, holding the current male and female hand-cycle world speed records of 51.58 mph (83.02 km/h) and 46.54 mph (74.88 km/h) respectively, set in 2018 with their Arion4 vehicle. The project was constrained by a tightly defined external envelope to meet rider ergonomic needs, safety rules, and critical transport limitations. Given the limited time and geometry freedoms, much of the vehicle was effectively locked down by early design requirements and keep-out zones (similar to those in motorsport). The rear tail section stood out as the best remaining opportunity to reduce overall aerodynamic drag before finalising the design. Solution As both a technical sponsor and aerodynamic partner, Navier supported...
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Navier presents CFD for contact tanks to water utilities at WRc forum

Navier presents CFD for contact tanks to water utilities at WRc forum

By Guest Admin Comment Closed
CFD analysis for Chlorine Contact Tanks Navier was delighted to receive an invitation from the Water Research Company (WRc) to present at one of their quarterly Disinfection Forums. The forum engages several water utilities based around the UK to address common issues and share best practices. Navier was asked to give a presentation on the use of Computational Fluid Dynamics (CFD) to model chlorine contact tanks (CCT’s). Generally, CFD modelling has become the preferred method for verifying the performance of new-build contact tanks. When applied correctly CFD has shown excellent agreement with both lab scale and on-site tracer studies. Example of poorly performing asset But CFD can also provide benefits in improving existing assets and de-risking tank 'change of use' activities. Example of contact tank retrofit modifications Some of these benefits include: Evaluating hydraulic & mixing efficiency of potential retrofits;Characterising performance over complete operating envelope accounting for seasonal water supply variations;Assessing energy efficiency (OPEX) of proposed modifications. The importance of assessing the energy efficiency of a proposed modification was...
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