TY  - THES
M1  - Doctoral
PB  - UCL (University College London)
SP  - 1
ID  - discovery10195946
Y1  - 2024/08/28/
N1  - Copyright © The Author 2024.   Original content in this thesis is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) Licence (https://creativecommons.org/licenses/by-nc/4.0/).  Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms.  Access may initially be restricted at the author?s request.
TI  - Air entrainment structure in a turbulent diffusion flame under cross wind:  a three-dimensional perspective
AV  - restricted
EP  - 1
UR  - https://discovery.ucl.ac.uk/id/eprint/10195946/
A1  - Mofidi, Nadia
N2  - Recent global wildfires highlight the significant impact of wind on flame geometry
and fire spread, complicating firefighting efforts. Strong winds make controlling and
extinguishing flames more challenging, enabling embers to spread and flames to leap
natural barriers. Unpredictable fire behaviour due to sudden wind changes poses risks
to wildland urban interface, communities and first responders. Understanding flame
behaviour in windy conditions is crucial for effective firefighting and city evacuation
planning.
The study focuses on flames under cross winds, a classic problem researched for
over seven decades. Existing literature lacks understanding of the air entrainment
mechanism in crosswind flames. The interaction between wind, buoyancy, and
turbulence remains a complex area requiring attention. This work aims to elucidate the
balance between these forces and describe the 3D shape resulting from their interplay,
using projective geometry and fluid dynamics. The research examines flame structure
changes caused by wind at micro and macro scales, exploring the leading edge and the
entire 3D structure. A scaling analysis identifies key variables, and a proposed pathway
estimates air entrainment in crosswind flames by combining information from
previous chapters.
KW  - Wildfire
KW  -  boundary layer flow
KW  -  flame under cross wind
ER  -