**5.1.4 Axial-symmetry**

Due to the idealised nature of some arterial computational models the use of an axialsymmetry boundary condition can greatly reduce the number of degrees of freedom that need to be solved for. This will reduce the computational demand without having to sacrifice the accuracy of the analysis. The Reynolds number for blood flow in DES computational models is normally small (Re<100), indicating laminar flow and as such the application of the axialsymmetry boundary condition should not influence the fluid flow solution.
