# Open source multiphysics software that can model the interaction of two insulators with a user-specified electrical force law?

Given two solid bodies of masses $$m_1$$ and $$m_2$$ with invariable charge distributions $$\rho_1(\mathbf{r_1})$$ and $$\rho_2(\mathbf{r_2})$$ in them,* respectively, I would like to model the electrical interaction of the bodies using a user-specified electrical force law.

* $$\mathbf{r_1}$$ and $$\mathbf{r_2}$$ are measured with respect to a coordinate system fixed to body 1 and body 2, respectively.

What open source multiphysics software packages could I use to model the motion of these bodies?

• I don't know of any software that can do this. But I imagine that you can combine a Boundary element method and a time integration scheme (like Verlet integration) for each iteration ... but I doubt that it is optimal. Feb 21 '19 at 21:21