BEGIN:VCALENDAR
PRODID:-//eluceo/ical//2.0/EN
VERSION:2.0
CALSCALE:GREGORIAN
BEGIN:VEVENT
UID:6e293dc44659d251e62705288464e003
DTSTAMP:20260703T145530Z
SUMMARY:Passive Scalar Dispersion in Moderately Stable Boundary Layers
DESCRIPTION:Abstract: Understanding pollutant dispersion in atmospheric bo
 undary layers is essential for assessing environmental and health risks fr
 om accidental or continuous emissions. Previous wind-tunnel experiments ex
 amined the influence of source size\, elevation\, and emission velocity on
  passive scalar dispersion in neutral boundary layers. These studies chara
 cterized concentration statistics\, intermittency\, and mixing\, showing t
 hat concentration probability density functions (PDFs) are consistently we
 ll described by a Gamma distribution.\nBuilding on this work\, we investig
 ate the effect of atmospheric stability using wind-tunnel experiments and 
 Large-Eddy Simulations. Stable stratification suppresses turbulence\, conf
 ines the plume\, and modifies both large-scale meandering and small-scale 
 mixing. Although concentration fluctuations and intermittency decrease wit
 h increasing stability\, concentration PDFs remain accurately represented 
 by a Gamma distribution. The combined experimental and numerical results s
 how that stability suppresses both meandering and turbulent mixing\, with 
 a stronger impact on large-scale fluctuations.\n\nBio:Pietro Salizzoni hol
 ds a Bachelor degree in Environmental Engineering from Politecnico di Tori
 no and a PhD in Environmental Fluid Mechanics. He is full Professor at Éc
 ole Centrale de Lyon. His teaching and research activities address physica
 l phenomena associated with natural and technological risks\, both acciden
 tal and persistent\, with a focus on the dynamics of environmental flows. 
 In particular\, his studies deal with pollutant dispersion in the urban at
 mosphere\, the propagation of hot smokes in free and confined environments
 \, the ventilation of road tunnel in case of fire\, the characterization o
 f atmospheric dispersion of toxic and flammable substances\, the transfer 
 within the environment and food chain of dioxin and other persistent organ
 ic pollutants.
URL:https://www.imperial.ac.uk/events/211135/passive-scalar-dispersion-in-m
 oderately-stable-boundary-layers/
DTSTART;TZID=Europe/London:20260701T150000
DTEND;TZID=Europe/London:20260701T160000
LOCATION:Skem 064A\, Skempton Building\, South Kensington Campus\, Imperial
  College London\, London\, SW7 2AZ\, United Kingdom
END:VEVENT
BEGIN:VTIMEZONE
TZID:Europe/London
BEGIN:DAYLIGHT
DTSTART:20260701T150000
TZNAME:BST
TZOFFSETTO:+0100
TZOFFSETFROM:+0100
END:DAYLIGHT
END:VTIMEZONE
END:VCALENDAR