From PhysOrg:
Pollock's signature style involved laying a canvas on the floor and pouring paint onto it in continuous, curving streams. Rather than pouring straight from the can, he applied paint from a stick or a trowel, waving his hand back and forth above the canvas and adjusting the height and angle of the trowel to make the stream of paint wider or thinner. Simultaneously restricted and inspired by the laws of nature, Pollock took on the role of experimentalist, ceding a certain amount of control to physics in order to create new aesthetic effects. Mahadevan, collaborating with art historian Claude Cernuschi and physicist Andrzej Herczyński, both at nearby Boston College, took an interest in Pollock when his colleagues suggested that the artist may have exploited the same aspects of fluid dynamics that Mahadevan has studied in the past.
Instabilities in a free fluid jet can form in a few different ways: the jet can break into drops, it can splash upon impact with a surface, or it can fold and coil, as when a stream of honey lands on a slice of toast. The artist Robert Motherwell produced drips and splashes by flicking his brush; Pollock's technique, on the other hand, is defined by the way a relatively slow-moving stream of paint falls onto the canvas, producing trails and coils. In a sense, the authors note, Pollock was learning and using physics, experimenting with coiling fluids quite a bit before the first scientific papers on the subject would appear in the late 1950s and '60s.
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