@TechReport{	  it:2006-026,
  author	= {Jan Nordstr{\"o}m and Ken Mattsson and Charles Swanson},
  title		= {Boundary Conditions for a Divergence Free
		  Velocity-Pressure Formulation of the Incompressible
		  {N}avier-{S}tokes Equations},
  institution	= {Department of Information Technology, Uppsala University},
  department	= {Division of Scientific Computing},
  year		= {2006},
  number	= {2006-026},
  month		= may,
  abstract	= {New sets of boundary conditions for the velocity-pressure
		  formulation of the incompressible Navier-Stokes equations
		  are derived. The boundary conditions have the same form on
		  both inflow and outflow boundaries and lead to a divergence
		  free solution. Moreover, the specific form of the boundary
		  conditions makes it possible derive a symmetric positive
		  definite equation system for the internal pressure.
		  Numerical experiments support the theoretical conclusions.
		  }
}