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Fire Science Show

Fire Science Show

Wojciech Wegrzynski 265 Episodes Oct 7, 2026

Fire Science Show connects fire researchers and practitioners with a society of fire engineers, firefighters, architects, designers, and others interested in creating a fire-safe future. Through interviews with diverse experts, it presents the history of the field as well as the most novel advancements. The show is produced in partnership with OFR Consultants.

Episodes

272 - How to add wind to fire CFD analysis?
272 - How to add wind to fire CFD analysis? Oct 7, 2026 2769 In this episode I take you into practicality of introducing wind into fire safety engineering considerations, and focus on it's implementation as a part of fire oriented CFD analyses. In here, we dig into why wind is tied to so many catastrophic fires, why firefighter safety is often shaped by sudden wind shifts, and why designing for calm air can quietly turn fire safety into a coin toss.I w
271 - pyFDS-Evac with Mohcine Chraibi
271 - pyFDS-Evac with Mohcine Chraibi Sep 30, 2026 3373 Smoke does not just slow people down, it changes what they believe is even possible. That simple idea is why we get so excited about pyFDS-Evac, an open source workflow that connects Fire Dynamics Simulator (FDS) results directly to modern evacuation modeling with JuPedSim. When the fire environment can remove an exit from view, reduce walking speed through extinction and soot exposure, or even in
270 - How the Cone Calorimeter took over with Marc Janssens
270 - How the Cone Calorimeter took over with Marc Janssens Sep 23, 2026 2965 A tool doesn’t become a global workhorse because it’s clever. It becomes a workhorse when different labs can run it, calibrate it, compare it, and trust it. It is a very long road from the invention to widespread use. And I got the chance to discuss the path of how the Cone took off with Dr. Marc Janssens, who is a key figure in this story - he was even jointly co-awarded the Phillip DiNenno Prize
269 - Fire investigations and the scientific method with Vincent Brannigan
269 - Fire investigations and the scientific method with Vincent Brannigan Sep 16, 2026 3555 A fire scene looks like a puzzle, but it’s a puzzle where the pieces melt, burn, and get hauled away before anyone can measure them. On the 25th anniversary of 9/11, I sit down with Professor Vincent Brannigan to ask a questions - does a fire investigation truly use the scientific method, or are we doing something else and calling it science?Vincent brings a rare mix of experience as a fire protec
268 - Is critical velocity that critical?
268 - Is critical velocity that critical? Sep 9, 2026 3156 Critical velocity is supposed to be the clean moment when tunnel smoke control flips from unsafe to safe. But after too many real projects and too many review battles, I am very sure that such a single number cannot be a sole proxy of what is safe or unsafe... So why it has so much power over my design?In this solo episode I walk through why critical velocity became the world's favorite proxy
267 - Modelling Fire Growth with Stephen Welch
267 - Modelling Fire Growth with Stephen Welch Sep 2, 2026 3723 Pretty CFD flames are something we got used to, but they usually are a product of our design assumptions - the design fire. While they give us a lovely illusion of being "real" fires, predicting real compartment fire growth is a completely different game. We’re joined by Dr. Stephen Welch (University of Edinburgh) to get honest about what “modeling fire spread” actually means, how quickl
266 - Compartment fire framework with Vinny Gupta
266 - Compartment fire framework with Vinny Gupta Aug 26, 2026 4247 A compartment fire is more than just “a fire in a room.” The moment flames, smoke, and heat are trapped by walls and fed through openings, the physics changes and so do the hazards we design for. We sit down with Dr. Vinny Gupta (University of Waterloo) to rebuild compartment fire thinking from the ground up, from what the enclosure does to airflow and smoke layers to why those effects still ancho
265 - How fires can lead to a nuclear winter? with Stephen Welch
265 - How fires can lead to a nuclear winter? with Stephen Welch Aug 19, 2026 4031 As a kid of 80s and 90s, a lot of the pop culture was around the post-apocalyptic scenarios following a nuclear exchange. I always thought a nuclear winter is a consequence of atomic bombs falling down, but now as a fire researcher I've learnt it is mostly about fires, after all. Today I sit down with Dr Stephen Welch (University of Edinburgh) to trace the fire-engineering-heavy pathway from
264 - Engineering Firebrand Showers with Samuel L. Manzello
264 - Engineering Firebrand Showers with Samuel L. Manzello Aug 12, 2026 3984 A wind-driven ember shower is a key wildfire exposures a building can face, but we have not yet fully understood or accounted for them in making our communities wildfire resilient. Today we sit down with Samuel L. Manzello of Tohoku University and Reax Engineering to unpack how in the last 20 years the firebrand science went from not being able to characterize the features of them well to being ab
263 - Developments in modelling WUI fires with Arnaud Trouvé
263 - Developments in modelling WUI fires with Arnaud Trouvé Aug 5, 2026 3791 Wildland-Urban Interface fires are a class of fires that deserves own models, own studies and a lot of research focus. This is what I discuss today with prof. Arnaud Trouvé from the University of Maryland, shortly before he has given his plenary talk at the recent Combustion Symposium in Kyoto. In this interview, Arnaud explains what makes wildland urban interface (WUI) fires and urban conflagrati
262 - Fire Fundamentals pt. 22 - Optical diagnostics in fire with Elizabeth Weckman
262 - Fire Fundamentals pt. 22 - Optical diagnostics in fire with Elizabeth Weckman Jul 29, 2026 3706 In todays episode of fire fundamentals we talk with Professor Elizabeth Weckman from University of Waterloo about advanced optical diagnostics that let fire researchers read temperature, chemistry, soot, and velocity from light without relying only on probes. We break down what cameras, infrared imaging, spectroscopy, lasers, and PIV can reveal, plus the calibration and interpretation pitfalls tha
261 - The story of the Cone Calorimeter with Vyto Babrauskas
261 - The story of the Cone Calorimeter with Vyto Babrauskas Jul 22, 2026 5624 The cone calorimeter sits in thousands of labs, shaping what we know about flammability, smoke production, and heat release rate. This essential piece of equipment comes with quite a story of how it was engineered or why its “obvious” design choices were anything but obvious. We wanted that history from the source, so we invited Professor Vyto Babrauskas to walk us through the decisions, constrain

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