Bert Blocken Profile picture
Professor of Engineering - Aerodynamics | Belgian | United Kingdom & Belgium | I speak for myself, not for my organisations
Jul 17, 2023 20 tweets 7 min read
(1/20) Our newest #cycling #research study: How much can bicycles on roof of team car following cyclist influence outcome of time trials?
Study by @KU_Leuven in partnership with @ANSYS
With application to @Letour ITT on 18 July 2023
#aerodynamics #engineering #science #TDF2023 Image (2/20) Debate was amplified in individual time trial (ITT) Tirreno-Adriatico 2022: 3 photos. From left to right: 10 bikes, 8 bikes, 1 bike on roof. Clearly no consensus among teams on possible aero benefit by bikes on roof.
@TirrenAdriatico #cycling #timetrial
@KU_Leuven @Ansys Image
Feb 23, 2023 24 tweets 20 min read
(0/n) Tomorrow, #Belgian #cycling season starts again with opening classic @OmloopHNB @Nieuwsblad_be Upon several requests, we provide thread on our research in cycling #aerodynamics including practical ramifications. Work by @KU_Leuven et al. in partnership with @Ansys
#Science (1/n) Well-known: cyclist in slipstream of another cyclist can typically get aerodynamic drag reduction of 30-40%. Is much more behind motorcycle, car or train. Known since at least 1899. “#Drafting” in the #slipstream is therefore common practice.
#Science #Engineering #cycling
Sep 22, 2022 18 tweets 12 min read
(1/17) @rivm in Nederland besluit uit haar literatuuronderzoek, na 2,5 jr pandemie, dat niet bewezen is dat mobiele #luchtreinigers transmissie v #COVID19 helpen reduceren. Die stelling is onzinnig, onverantwoord, zelfs schadelijk. Vraagt om 'en draadje.
rivm.nl/nieuws/effect-… (2/17) Uiteraard moet het gaan om goede apparaten die voldoende krachtig zijn voor de ruimte waarin ze opgesteld staan (reinigingsfrequentie van minstens 6 keer per uur) en moeten ze goed onderhouden worden. Evident. Geldt voor alle mechanische systemen.
#covid #luchtreiniger Image