  We investigate the dynamics of linear perturbations in Keplerian flow under
external stochastic force. To abstract from the details of flow structure and
boundary conditions, we consider the problem in the shearing box approximation.
An external force is assumed to have zero mean, even so, induced perturbations
form a steady-state, which provides angular momentum transfer to the periphery
of the flow. The most effective scenario is based on the transient
amplification of induced vortices with the following emission of shearing sound
wave, wherein the maximum of the flux linearly depends on Reynolds number. Thus
such a mechanism is significant for astrophysical flows, for which enormous
Reynolds numbers are typical. At the same time, addressing the problem
analytically, we found that for incompressible fluid in the shearing box
approximation stochastic forcing does not lead to average angular momentum
transfer. Thus the compressibility of the fluid plays an important role here,
and one cannot neglect it.
