<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>
<div style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" class="elementToProof ContentPasted0">
<span style="font-size: 14pt;"><i><b>"Airborne Observation from Experimental Fire: fire behavior metrics, plume simulation and synthetic IR image modelling"</b></i></span>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0"><span style="font-size: 16pt;"><b>Ronan Paugam</b></span></div>
<div class="ContentPasted0">Researcher, Universitat Politecnica de Catalunya</div>
<div class="ContentPasted0">Barcelona, Catalunya, ES</div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0"><i>** Cohosted by the <b>Geophysical Fluid Dynamics Institute</b> and the
<b>Department of Scientific Computing</b> **</i></div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0"><i>NOTE: Please feel free to forward/share this invitation with other groups/disciplines that might be interested in this talk/topic.
<b>All are welcome to attend. </b></i></div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0"><b>https://fsu.zoom.us/j/94273595552 </b></div>
<div class="ContentPasted0">Meeting # <b>942 7359 5552 </b></div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0"><b>Wednesday, Apr 19th</b>, 2023, Schedule: </div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">* 3:00 to 3:30 PM Eastern Time (US and Canada) </div>
<div class="ContentPasted0">Nespresso & Teatime (in 417 DSL Commons) </div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">* <b>3:30 to 4:30 PM</b> Eastern Time (US and Canada)
</div>
<div class="ContentPasted0"><b>Colloquium</b> - Attend F2F (in 499 DSL) or Virtually (via Zoom)
</div>
<div class="ContentPasted0"> </div>
<div class="ContentPasted0 elementToProof"><b><br>
</b></div>
<div class="ContentPasted0 elementToProof"><b>Abstract: </b></div>
<div class="ContentPasted0 elementToProof"><b><br>
</b></div>
<div class="ContentPasted0 elementToProof">Coupled fire-atmosphere systems are currently developed to respond to the need for operational systems in air quality and fire attack management. This presentation shows how Infra-Red airborne observation can be used
to support this goal.</div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">Using experimental fire of several hectares conducted in savanna type vegetation, IR images are collected both from a Middle Infra-Red (MIR) and Long Wave Infra-Red (LWIR) camera operated from hovering helicopter. Images are then
postprocessed including orthorectification of images time series and fire front segmentation. Finally, fire behaviors metrics are extracted. Maps of fire intensity, Rate of Spread and Fire Radiative Power (FRP) at 1m spatial resolution and 1Hz are presented
for 4 experimental burns ranging from 4 to 8 ha.</div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">Using this fire behavior metrics and assumption on radiative/convective fraction, convective heat released are computed at a resolution of 2m. Using the so-called burner method that we implement in the MesoNH-ForeFire model, the
plume dynamics is simulated over the duration of the whole fire progression. Such an approach can provide reference test cases for more complex coupled fire-atmosphere simulation. First sensitivity study on the effect of the cooling area on the plume dynamics
is then discussed.</div>
<div><br class="ContentPasted0">
</div>
Finally, the presentation shows recent work on radiative transfer simulation in the context of fire scene based on the DART model. This supports an effort to develop an end-to-end simulation strategy capable of linking fire simulated scene and direct observable
such as IR images. Using FDS simulation of grass land fire coupled with DART, we simulate synthetic IR ground and airborne MIR images. This development aims at better understanding active fire monitoring, in particular the effect of flames and plume geometry
on the FRP computation.<br>
</div>
<div style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" class="elementToProof ContentPasted0">
<br>
</div>
</body>
</html>