Thank You.
I went through the documentations and realized that in step 8 Dirichlet
boundary conditions are being applied using the constraint object. Hence,
we only need to pass the constraint object to
VectorTools::interpolate_boundary_values. No need to pass the
'boundary_values' std::map object.
I made that change as follows:
FEValuesExtractors::Scalar u_x(0);
FEValuesExtractors::Scalar u_y(1);
ComponentMask u_x_mask = fe.component_mask(u_x);
ComponentMask u_y_mask = fe.component_mask(u_y);
double u_x_values = 1.2;
double u_y_values = 0.0;
VectorTools::interpolate_boundary_values(dof_handler,
0,
Functions::ZeroFunction<dim>(dim),
constraints); //imposing both
u_x and u_y to be zero on boudaries with id=0
VectorTools::interpolate_boundary_values(dof_handler,
1,
Functions::ConstantFunction<dim>(dim)(u_x_values,2),constraints,u_x_mask);
//imposing u_x=1.2 on
boudaries with id=1
VectorTools::interpolate_boundary_values(dof_handler,
1,
Functions::ConstantFunction<dim>(dim)(u_y_values,2),constraints,u_y_mask
);//imposing u_y=0 on
boudaries with id=1
Now, it gives the following error:
error: no match for call to ‘(dealii::Functions::ConstantFunction<2,
double>) (double&, int)’
Functions::ConstantFunction<dim>(dim)(u_x_values,dim),constraints,u_x_mask);
It gives the same error for u_y also.
On Mon, Sep 19, 2022 at 3:09 AM Wolfgang Bangerth <[email protected]>
wrote:
> On 9/18/22 06:51, Wasim Niyaz Munshi ce21d400 wrote:
> > VectorTools::interpolate_boundary_values(dof_handler,
> > 1,
> >
> Functions::ConstantFunction<dim>(dim)(u_y_values,2),boundary_values,u_y_mask,
> > constraints);
>
> You are providing both the 'boundary_values' std::map object, and the
> 'constraints' AffineConstraints object. There are two versions of this
> function, one for each kind, but you can only provide one of these objects
> to
> each.
>
> Best
> W.
>
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> ------------------------------------------------------------------------
> Wolfgang Bangerth email: [email protected]
> www: http://www.math.colostate.edu/~bangerth/
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