  We study the transport of inertial Brownian particles in steady laminar flows
in the presence of two-dimensional Gaussian potentials. Through extensive
numerical simulations, it is found that the transport is sensitively dependent
on the external constant force and the Gaussian potential. Within tailored
parameter regimes, the system exhibits a rich variety of transport behaviors.
In the absence of any external driving forces, the spontaneous rectification of
the particles can be manipulated by the spatial position of the Gaussian
potential. Moreover, when the potential lies at the center of the cellular
flow, the system exhibits absolute negative mobility (ANM), i.e., the particles
can move in a direction opposite to the constant force. More importantly, the
phenomenon of ANM induced by Gaussian potential is robust in a wider range of
the system parameters and can be further strengthened with the optimized
parameters, which may pave the way to the implementation of related
experiments.
