Re: [deal.II] Issue with convergence of iterative linear solver for system matrix in modified step-57 with no-normal flux constraints

2018-02-18 Thread Bruno Blais
Hello, My gmsh mesh produces 3 physical groups which are independent. Say my simulation is the flow around a cylinder. The cylinder is a physical group (0), the inlet (say left wall) is a class inheriting from the Function class which sets the X component to 1 and the Y component to 0 and uses t

[deal.II] Re: step-22 partial boundary conditions

2018-02-18 Thread Jane Lee
HI, I'm still looking for help with this problem. it would be much appreciated. thanks On Monday, January 15, 2018 at 11:39:16 PM UTC, Jane Lee wrote: > > Hi Wolfgang, happy new year and hope you had a good break. > > I'm back working on this and I just don't understand what I am doing > wrong

Re: [deal.II] Issue with convergence of iterative linear solver for system matrix in modified step-57 with no-normal flux constraints

2018-02-18 Thread Timo Heister
Are you setting the conditions correctly for the zero_constraints and the nonzero_constraints and are you sure you are not applying other boundary conditions on that wall (for example with interpolate_boundary_values())? On Sat, Feb 17, 2018 at 5:46 PM, Bruno Blais wrote: > Hello everyone, > > I