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SUMMARY:Indoor airborne disease transmission: fluid dynamical modelling an
 d mitigation strategies - Rajesh Bhagat\, DAMTP
DTSTART:20220121T160000Z
DTEND:20220121T170000Z
UID:TALK168434@talks.cam.ac.uk
CONTACT:Prof. Jerome Neufeld
DESCRIPTION:Throughout human history\, nothing has killed more people than
  infectious diseases. Natural pandemics are ever-present and the next pand
 emic is a matter of ‘when’\, not ‘if’. The event frequency for pan
 demics caused by natural and synthetic pathogens are likely to increase du
 e to human encroachment into natural environments\, bio-terrorism threats\
 , high population density urban settings\, lifestyles\, and global connect
 ivity. Covid-19 has clearly demonstrated the lack of understanding of airb
 orne disease transmissions: we have been caught responding too late to the
  situation\, and there is an urgent need to develop fundamental understand
 ings and improve preparedness at all levels (Bhagat et al. 2020\; Bhagat &
  Linden 2020\; Burridge et al. 2021).\n\nEssentially\, indoor airborne dis
 ease transmission is a fluid dynamics problem\; the formation of potential
 ly contagion laden droplet/bio-aerosols is an interfacial flow problem and
  their subsequent transport in the indoor environment is a building ventil
 ation flow problem. Dealing with Covid-19 has clearly demonstrated the nee
 d for a better understanding of these problems and\, most importantly\, di
 ssemination of existing knowledge for their real-world application (Bhagat
  et al. 2020\; Bhagat & Linden 2020). We all accept the need for higher ve
 ntilation rates to reduce the risk of transmission\; however\, tension pre
 vails between working towards greater energy efficiency\, achieving net-ze
 ro\, and meeting ventilation needs.\n\nMost of the buildings where we will
  live in the coming decades have already been built\; in my presentation\,
  I will show how field experiments allow us to understand these buildings.
  The work we have done and the solutions we have proposed – for example\
 , how to ventilate makeshift hospitals in extremely resource and time limi
 ting situations (Bhagat & Linden 2020) – are relevant for retrofitting e
 xisting buildings in order to create a resilient and sustainable built env
 ironment. I will talk about window types and how they influence ventilatio
 n. I will present our recent work on the relative importance of wind and b
 uoyancy-driven natural ventilation.
LOCATION:MR2\, Centre for Mathematical Sciences\, Wilberforce Road\, Cambr
 idge
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