At the beginning, Dr. Stefan Schumacher from the Institute of Energy and Environmental Technology e.V. (IUTA) explained how aerosols are made and how they behave in space as well as in contact with objects such as protective masks. He cleared up various misunderstandings about aerosols and pointed out that aerosol particles are very variable and highly dynamic. Viruses get into the air through exhaled particles and could linger there for a long time. However, they are subject to dynamic changes and could also be guided in this way.
To understand how viruses spread locally in buildings and rooms, the visualization of air currents can help. The expert for fluid simulations, Christian Barthel from Dassault Systémes Deutschland GmbH, demonstrated these flow simulations using real examples from the clinical sector. Scientifically based simulations showed the pathways of particles and the changes caused by solar radiation or the opening of windows. In this way, dangerous spots could be anticipated and the setting modified on site in order to reduce the risk of contamination.