  We predict a linear logarithmical scaling law of Bloch oscillation dynamics
in Weyl semimetals (WSMs), which can be applied to detect Weyl nodal points.
Applying the semiclassical dynamics for quasiparticles which are accelerated
bypassing a Weyl point, we show that transverse drift exhibits asymptotically a
linear log-log relation with respect to the minimal momentum measured from the
Weyl point. This linear scaling behavior is a consequence of the monopole
structure nearby the Weyl points, thus providing a direct measurement of the
topological nodal points, with the chirality and anisotropy being precisely
determined. We apply the present results to two lattice models for WSMs which
can be realized with cold atoms in experiment, and propose realistic schemes
for the experimental detection. With the analytic and numerical results we show
the feasibility of identifying topological Weyl nodal points based on the
present prediction.
