### Inverse Methods with SSA

Posted:

**09 Jul 2015, 06:13**Is it possible to use either the Adjoint or Robin inverse methods for viscosity and basal shear stress with the SSA solver in Elmer?

As best as I can tell there is not since the adjoint is taken with respect the Stokes equations for both those methods, and the stress at the surface is not calculated so the Robin methods cannot be used either. It would be great to get confirmation or find out that I'm not correct though.

As best as I can tell there is not since the adjoint is taken with respect the Stokes equations for both those methods, and the stress at the surface is not calculated so the Robin methods cannot be used either. It would be great to get confirmation or find out that I'm not correct though.