  This paper discusses the feasibility of experimental control of the flow
direction of atomic Bose-Einstein condensates in a double-well potential using
phase-imprinting. The flow is induced by the application of a time-dependent
potential gradient, providing a clear signature of macroscopic quantum
tunneling in atomic condensates. By studying both initial state preparation and
subsequent tunneling dynamics we find the parameters to optimise the phase
induced Josephson current. We find that the effect is largest for condensates
up to a few thousand atoms, and is only weakly-dependent on trap geometry.
