Long Slender Thread or Filament

Long slender thread or filament crossword clue, 5 letters. UK Daily Express small crossword found in 4 Oct 2017.

Answer: FIBRE.

Long slender thread or filament in sentence

When a viscous fluid, like oil or syrup, streams from a small orifice and falls freely under gravity, it forms a long slender thread or filament, which can be maintained in a stable, stationary state with lengths up to several meters. We shall discuss the shape of such liquid threads and their surprising stability. It turns out that the strong advection of the falling fluid can almost outrun the Rayleigh-Plateau
instability. Even for a very viscous fluid like sirup or silicone oil, the asymptotic shape and stability is independent of viscosity and small perturbations grow with time as exp.

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