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SUMMARY:MechE Seminar : Canopy flows of the built environment : Numerical 
 and experimental assessment of flow dynamics around photovoltaic farms
DTSTART:20240524T110000
DTEND:20240524T120000
DTSTAMP:20260501T170840Z
UID:a00bef71e5afa1e60c050092ed1dfe094bcc88c1a0f50f8b269fb2f2
CATEGORIES:Conferences - Seminars
DESCRIPTION:Pier Giuseppe Ledda\nDescription:\nThe growing demand of renew
 able energy installations demands guidelines for understanding their micro
 meteorological impact and environmental integration. Agrivoltaic farms\, w
 hich combine energy harvesting with crop cultivation\, represent a potenti
 al blend of energy generation and landscape preservation. However\, the im
 pact of photovoltaic farms on micrometeorological conditions remain poorly
  understood. As a first block toward a better understanding of these modif
 ications\, we perform fluid dynamics analyses on the canopy flow generated
  by these arrays. In particular\, we conduct a combined experimental and n
 umerical investigation on a  model of photovoltaic farm when invested by 
 orthogonal wind. Experiments are performed within a water channel through 
 a Feature Tracking Velocimetry algorithm. We vary the panel tilt angle and
  distance between the panels. Panel tilt angles influence airflow patterns
 \, causing none\, one or more recirculation regions and change the overlyi
 ng structure of the turbulent boundary layer. The observed patterns are th
 en compared with numerical simulations of the atmospheric flow\, with a go
 od agreement: within a numerical approach\, we analyze temperature and moi
 sture changes under varying conditions such as solar radiation and panel c
 onfigurations.  Panel installation reduces air velocity\, increases tempe
 rature\, and creates non-uniformities at the crop level\, analyzed in deta
 il.  In actual agrivoltaic farms\, these flow modifications affect moistu
 re and temperature transport\, which can be related to the hydrological ba
 lance at the ground and\, in turn\, to crop growth.\n\nBio:\nP.G. Ledda is
  a research assistant at the University of Cagliari\, Sardinia\, Italy. Af
 ter obtaining his PhD degree at EPFL in 2022\, he joined the hydraulics de
 partment at the University of Cagliari. His research involves different as
 pects of fluid mechanics. During his PhD\, he extensively worked within th
 e framework of flows past permeable bluff bodies (aerodynamic flows and fa
 lling objects) and pattern formation of thin liquid films and free-surface
  flows. He exploits theoretical developments with numerical simulations as
  well as experimental campaigns to assess practical consequences on flows 
 of interests. He is actively working on low-Reynolds hydraulics\, bio-flui
 d mechanics (cardiovascular and eye-tamponade flows)\, heat transfer and d
 ispersion in indoor environments as well as turbulent atmospheric flows ar
 ound and through canopies and their effect on the surrounding environment.
  \n\n\n 
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
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