FEniCS is a finite element library for {`}automated, efficient solution of differential equations' (www.fenicsproject.org). The focus has been to develop high level software interface that allows the user to type in the equations nearly as they are read. Recent development has involved extensions for parallell computing and building efficient pipeline for patient specific geometries based on Vascular Modelling Toolkit (VMTK, www.vmtk.org) meshes. The aim is therefore to evaluate the accuracy and efficiency of one of the developed computational fluid mechanics (CFD) solvers. The simulations were perfored according to the given instructions and information is not repeated. This abstract is therefore not complete and must be seen in the light of the Challenge.