A plane jet, slowing and widening at once

The velocity profile of a plane jet at three stations. The centreline speed falls as x^{−1/3} and the width grows as x^{2/3}, and the two exponents are not independent: their combination is fixed by the one thing a free jet conserves, which is its momentum flux. The profile has no edge — it decays exponentially — so every width quoted for a jet is a choice of contour, and the half-speed width is the one used here.

1 essay calls laminar-jet. The drawing above is what it returns with no arguments at all; every call below passes it something, because a placement that passes nothing draws whichever member of the family the generator happens to default to rather than the one its essay argues about.

It is also the blast radius. Changing laminar-jet changes every figure listed here at once, and on this site it may change what they assert as well as what they show — which is what has to be rebuilt and looked at before the change is believed.