Generation of Computational Mesh for Haemodynamics Analysis - Computational Hemodynamics: Theory, Modelling and Applications - page 157

Fig. 6.3 An example of a
mesh using staircase-like
steps for a simplified 90°
bend in the aortic arch
Fig. 6.4 An example of a body-fitted mesh for the 90° bend geometry and corresponding compu-
tational geometry
to the physical domain via the transformation of grid points. Because of the need to
solve the equations in the computational domain, they have to be expressed in terms
of the curvilinear coordinates rather than the Cartesian coordinates, which means
that they must be transformed from ( x , y ) to ( ξ, η ) as the new independent variables.