Fire Science Show
Fire Science Show
Wojciech Wegrzynski
257 - Fire Fundamentals pt. 21 - Radiation with Simo Hostikka
1 hour 3 minutes Posted Jun 24, 2026 at 3:00 am.
Why Radiation Matters In Fires
How Simo Entered Radiation Modeling
Radiation’s Two Jobs In CFD
Spectrum Basics And Blackbody Rules
Gases Soot And Flame Radiation
How FDS Solves Radiation Transport
Ray Effect Diffusion And Monte Carlo
Radiative Fraction Emissivity And Wrap Up
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Show notes
In this episode of fire fundamentals we sit down with Professor Simo Hostikka from Aalto University to cover radiation in fires, both from the angle of physical phenomena and ways to model it. In this episode we cover following topics: feel less mysterious, from blackbody basics and role of radiation actually does inside the CFD N-S equation. Spectrum and emissivity to real engineering outcomes like heat flux, tenabilityRadiation’s two roles in fire CFD: target heat flux and the ga...