This image was created by Ke Gao, Yinhui Wang and, Zemiao Yang in their study to better understand the microstructure and propagation characteristics of coal explosions in coal mine production. To simulate coal explosions, coal dust was placed in a Hartmann tube and ignited. The coal dust explosions were captured at the end of the Hartmann tube using the Schlieren technique. The photo on the right highlights the key characteristics of the flame, while the photo on the left shows the unprocessed flame contour. By utilizing fractal theory and image recognition, each pixel was compared to other pixels near it to process the contour of the flame (Left Image) to the mapped key characteristics of the flame (Right Image).
Both images are equally engrossing. They capture the beauty within the same flame. The Schlieren technique and comparison of both images side by side create a unique image.
Article: https://www.nature.com/articles/s41598-024-83040-z#citeas
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Second prize:
I think that schlieren imaging is a really cool way to visualize different flows, and this one was a very diverse example from what I’ve seen schlieren used for in the past. This explosion is pretty awesome when viewed through this lens.