  We present Oseen equations on Lipschitz domains in a port-Hamiltonian
context. Such equations arise, for instance, by linearization of the
Navier-Stokes equations. In our setup, the external port consists of the
boundary traces of velocity and the normal component of the stress tensor, and
boundary control is imposed by velocity and normal stress tensor prescription
at disjoint parts of the boundary. We employ the recently developed theory of
port-Hamiltonian system nodes for our formulation. An illustration is provided
by means of flow through a cylinder.
