  We study the properties of various Eulerian contributions to fluid particle
acceleration by using well-resolved direct numerical simulations of isotropic
turbulence, with the grid resolution as high as $12288^3$ and the Taylor-scale
Reynolds number $R_\lambda$ in the range between 140 and 1300. The variance of
convective acceleration, when normalized by Kolmogorov scales, increases
linearly with $R_\lambda$, consistent with simple theoretical arguments, but
very strongly differing from phenomenological predictions of Kolmogorov's
hypothesis as well as Eulerian multifractal models. The scaling of the local
acceleration is also linear $R_\lambda$ to the leading order, but more complex
in detail. The strong cancellation between the local and convective
acceleration -- faithful to the random sweeping hypothesis -- results in the
variance of the Lagrangian acceleration increasing only as $R_\lambda^{0.25}$,
as recently shown by Buaria \& Sreenivasan [Phys. Rev. Lett. 128, 234502
(2022)]. The acceleration variance is dominated by irrotational pressure
gradient contributions, whose variance also follows an $R_\lambda^{0.25}$
scaling; the solenoidal viscous contributions are relatively small and follow a
$R_\lambda^{0.13}$, consistent with Eulerian multifractal predictions.
