Publications by authors named "Giovanni Di Cristina"
Comparison of two flow measurement devices for use in fire experiments.
Proc Combust Inst
January 2024
Bi-directional probes are utilized throughout fire science to measure fire-induced flows due to their ability to measure flow which changes direction, and to withstand hostile environments. However, they are not available commercially and researchers must take it upon themselves to make and manufacture them. S-type pitot probes (S-probes) work on the same principle as bi-directional probes, measuring the differential pressure between two openings, thereby offering the same benefits.
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- - Recent experiments reveal that strong columnar vortices, like those seen in fire whirls, can develop away from the main fire front, particularly in areas with smoldering fuel, where hot embers can be lifted into the air.
- - The study focuses on how these buoyancy-induced vortices impact the surrounding smoldering fuel, with an emphasis on how they can draw in fresh air and potentially trigger new ignitions.
- - Utilizing NIST's Fire Dynamics Simulator, researchers model these vortices to examine how changes in temperature and vorticity affect their behavior, aiming to enhance our understanding of these phenomena for improved wildfire risk management.