An ordinary squirt of canned air achieves supersonic speeds - engineer spots telltale shock diamonds

Tom's Hardware
Feb 18, 2024, 12:19 pm316 ptsTop
A precision engineering and machining YouTuber noticed telltale ‘shock diamonds’ in the stream emitted by his Staples-branded canned air and felt compelled to investigate further. Using a Schlieren imaging setup the YouTuber confirmed that the air duster was pushing out a supersonic flow of gas.

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