Website Bert Blocken, PhD - Unit Building Physics and Services - Department of the Built Environment
Eindhoven University of Technology, The Netherlands

 

CYCLING aerodynamics research


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New research results on cycling aerodynamics:

Publication:

Performed by:

Bert Blocken (Eindhoven University of Technology, NL and Leuven University, B)
Yasin Toparlar (
Eindhoven University of Technology, NL)

        

ANNOUNCEMENT: This research work is borne out of our passion for cycling and our respect and appreciation for cycling top athletes and their performances.
It is by no means intended as criticism, neither to the top athletes, nor to the UCI or any other organization.
Our only goal is to advance the state-of-the-art in science and engineering, including science in cycling.

Image: Wind tunnel test of influence of following car on cyclist drag (Blocken & Toparlar 2015)

Image: Wind tunnel test of influence of following car on cyclist drag (Blocken & Toparlar 2015)

Image: Wind tunnel test of influence of following car on cyclist drag (Blocken & Toparlar 2015)

Movie: CFD simulation: contours of wind speed for 5 m distance between cyclist and following car at a cycling speed of 54 km/h (Blocken & Toparlar 2015)

Movie: CFD simulation: contours of pressure coefficient for 5 m distance between cyclist and following car at a cycling speed of 54 km/h (Blocken & Toparlar 2015)

Image: Wind tunnel test of influence of following car on cyclist drag (Blocken & Toparlar 2015)

Image: Wind tunnel test of influence of following car on cyclist drag (Blocken & Toparlar 2015)

Image: Wind tunnel test of influence of following car on cyclist drag (Blocken & Toparlar 2015)


Previous research results on aerodynamics of a single cyclist: see articles here (years 2010, 2011)

Performed by:

Thijs Defraeye (Leuven University, B)
Bert Blocken (
Eindhoven University of Technology, NL)
Erwin Koninckx (
Leuven University, B)
Peter Hespel (
Leuven University, B)
Jan Carmeliet (
ETH Zurich and EMPA, CH)
 

Images: Left: Laser scanning of elite cyclist. Right: Result of laser scanning: surface geometry (Koninckx et al. 2007)

 

Images: Results of laser scanning: point cloud and surface geometry (Koninckx et al. 2007)

 

      

Images: Preparation of wind tunnel tests - pressure plates on cyclist and bicycle on force platform (Defraeye et al. 2010)

 

      

Images: Preparation of wind tunnel tests - pressure plates on cyclist and cyclist and bicycle on force platform (Defraeye et al. 2010)

 

Images: Preparation of wind tunnel tests - bicycle on florce platform, cyclist on bicycle, and flow visualization in wind tunnel (Defraeye et al. 2010)

 

                

Images: Cyclist equipped with pressure plates and bicycle on force platform just before wind tunnel tests (Defraeye et al. 2010)

 

Image: Detail view of computatinonal grid on head and top of torso and in vertical center plane (Defraeye et al. 2010)

 


Previous research results on aerodynamics of drafting cyclists: see article here (year 2013)
 

Performed by:

Bert Blocken (Eindhoven University of Technology, NL)
Thijs Defraeye (
Leuven University, B)
Erwin Koninckx (
Leuven University, B)
Peter Hespel (
Leuven University, B)
Jan Carmeliet (
ETH Zurich and EMPA, CH)
 

Image: Detail view of computatinonal grid for two drafting cyclists in time-trial position and in vertical center plane (Blocken et al. 2013)

 

Images: Left: wind speed contours in vertical center plane. Right: pressure coefficients in vertical center plane (Blocken et al. 2013)

   

Image: Front page publication in EuroPhysics News (Blocken et al. 2013)


Image: Top of front page publication in Computers &  Fluids (
Blocken et al. 2013)