Movie S2.

Burning of blue whirls over water with fuel injection at a constant flow rate. This representative movie shows two different burning processes and a close-up of blue whirls: (i) burning of a stable blue whirl, (ii) transition between blue and yellow whirls during blue whirl burning shown at regular and reduced speeds, and (iii) close-up of blue whirl structure and motion at regular and reduced speeds.

From fire whirls to blue whirls and combustion with reduced pollution

Huahua Xiao, Michael J. Gollner, and Elaine S. Oran

PNAS. 2016. 113:9457-9462 DOI: 10.1073/pnas.1605860113