Robuta

https://www.nist.gov/publications/physical-and-chemical-aspects-cup-burner-flame-extinguishment
physicalchemicalaspectscupburner
https://www.nist.gov/publications/thermal-agent-extinguishment-two-types-diffusion-flames
The extinguishment of diffusion flames on two types of burners-an opposed-flow Tsuji burner and an axisymmetric burner with a surrounding coflow-by thermal agen
two typesthermalagentextinguishmentdiffusion