> Related question for both incompressible flow and elasticity > problems. Suppose I have a plane of symmetry that will allow me to > reduce my computational domain. If > > \sigma_ij > > is the relevant stress tensor, then I will have that > > t^k_i \sigma_ij n_j = 0
Ones you have tangential and normal vectors, you can include this as a boundary term to the ffc form? > > where t^k is the k-th tangential vector of the local geometry. > Physically, this is vanishing shear stress. This is in addition to > the condition > > u_i n_i = 0 > > for no normal flow (the slip condition). > > Any thoughts on implementing the vanishing shear stress condition? > > -gideon > > On Jan 14, 2008, at 2:57 PM, Murtazo Nazarov wrote: > >>> Is there an obvious high level way to implement normal flow type >>> boundary conditions or symmetry type boundary conditions? >>> >>> -gideon >>> >> >> If you mean slip boundary condition which for normal velocity, it is >> already implemented and soon will be available with UNICORN. >> >> The slip with friction is also implemented. >> >> /murtazo >> >>> _______________________________________________ >>> DOLFIN-dev mailing list >>> [email protected] >>> http://www.fenics.org/mailman/listinfo/dolfin-dev >>> >> >> > > _______________________________________________ > DOLFIN-dev mailing list > [email protected] > http://www.fenics.org/mailman/listinfo/dolfin-dev > _______________________________________________ DOLFIN-dev mailing list [email protected] http://www.fenics.org/mailman/listinfo/dolfin-dev
