(1/2) #COVID19 #SocialDistancing when walking/running/#cycling nearby non-family members. Summary in @hbvl & @HLN_BE. Message: keep exercising but stay outside slipstreams. Movie below: for walking.
Research @TUeindhoven @LeuvenU @ansys #CFD #aerodynamics #COVID #CoronaCrisis pic.twitter.com/LFA7EkU5xG

Summary and conclusions

…This suggests that avoiding substantial droplet exposure in the conditions of this study can be achieved by one of two actions: either by avoiding to walk or run in the slipstream of the leading person or by keeping larger social distances, where the distances increase with the walking or running speed. The equivalent social distance for walking and running in the slipstream is defined as the distance that should be kept between the leading and trailing walker/runner to avoid substantial exposure to slipstream droplets, similar to the case where two people are standing still at 1.5 m distance. In the absence of head wind, tail wind and cross-wind, for walking fast at 4 km/h this distance is about 5 m and for running at 14.4 km/h this distance is about 10 m. Further work should consider the effect of head wind, tail wind and cross-wind, and different droplet spectra.