About "Split Resistance" option

[Quentin Herszkowicz]

Hello,

We are working on the pulmonary arteries and we would like to distribute the resistances on 6 outlets corresponding to the 6 lobar arteries.

Simvascular offers the option in Inlet and Outlet BCs to Split Resistance. Nevertheless, we would like to know if this distribution of resistances also takes into account the geometry (is the global resistance imposed equal to the resistance of the geometry + the resistances at the outlets?)

Thanks.

Quentin Herszkowicz

[Weiguang Yang]

To my knowledge, the resistance split doesn't take account of the 3D model resistance of the 3D model. It just distributes the total resistance you provide following a power law. If we assume the pressure across the resistors is the same (i.e. in parallel), the resistance is split such that Q is proportional to r^\alpha, where \alpha is the Murray coefficient you specify.