Fig 3. Geometry and boundary conditions.

Geometry of two-dimensional growth of a vascular tumour with boundary and initial conditions. Note that the initial tumour radius is not sketched to scale. The boundary condition for the study of nanoparticle transport in Section 3.2 is given by the mass fraction of nanoparticles in the vasculature ${\omega }_D^{\text{NP}\overline{v}}$ in red. The index D marks Dirichlet values.