  In this paper we explore the relationship between protostellar outflows and
turbulence in molecular clouds. Using 3-D numerical simulations we focus on the
hydrodynamics of multiple outflows interacting within a parsec scale volume. We
explore the extent to which transient outflows injecting directed energy and
momentum into a sub-volume of a molecular cloud can be converted into random
turbulent motions. We show that turbulence can readily be sustained by these
interactions and show that it is possible to broadly characterize an effective
driving scale of the outflows. We compare the velocity spectrum obtained in our
studies to that of isotropically forced hydrodynamic turbulence finding that in
outflow driven turbulence a power law is indeed achieved. However we find a
steeper spectrum (beta ~ 3) is obtained in outflow driven turbulence models
than in isotropically forced simulations (beta ~ 2). We discuss possible
physical mechanisms responsible for these results as well and their
implications for turbulence in molecular clouds where outflows will act in
concert with other processes such as gravitational collapse.
