Navier-Stokes turbulence at low Reynolds number (R(lambda) almost-equa
l-to 15) is studied by high-resolution computer simulation. The energy
spectrum in the range 5k(d) < k < 10k(d) is well fitted by k(alpha) e
xp(-ck/k(d)), where k(d) is the Kolmogorov dissipation wave number, al
pha almost-equal-to 3.3 and c almost-equal-to 7.1. High-order spatial
derivatives of the velocity field exhibit strong intermittency, associ
ated with gentle spatial variation of large-scale structure rather tha
n with sparse, intense small-scale structures. Analysis by the direct-
interaction approximation, which ignores intermittency, gives alpha =
3, c almost-equal-to 11.