Cerebral venous network
The cerebral venous network mesh is obtained using filtering and/or segmentation of MRA (magnetic resonance angiography) images like Figure 1.
The FreeFem algorithm used in this siumation is the unsteady Navier-Stokes Uzawa algorithm with the cerebral venous network mesh. A constant flow is imposed at the inlets of the cerebral venous network, a null velocity on the wall and the outlets (jugular veins) are free. Result is shows Figure 2 where pressure field is displayed on the wall and velocity is displayed using some stream lines.