Compatible Discrete Operator schemes for the steady incompressible Stokes and Navier-Stokes equations

Overview & Synopsis

We extend the Compatible Discrete Operator (CDO) schemes to the steady incompressible Stokes and Navier-Stokes equations. The main features of the CDO face-based schemes are recalled: a hybrid velocity discretization with degrees of freedom at faces and cells, a stabilized velocity gradient reconstruction defined on the face-based sub-cell pyramids, and a discrete pressure attached to the mesh cells. We introduce a discrete divergence operator that will account for the velocity-pressure coupling, and a hybrid discretization of the convection term. The results of several benchmark test cases validate the framework.