Thanks for the response!
I tried to put "Assert (system_matrix.n() == dof_handler.n_dofs(),
ExcInternalError()); " when I assemble system , but i get the same error
message, regardless of it
*An error occurred in line <1668> of file
</Users/kimjaekwang/dealii-8.4.1/include/deal.II/lac/constraint_matrix.templates.h>
in function*
* void dealii::internals::dealiiSparseMatrix::add_value(const LocalType,
const size_type, const size_type, SparseMatrixIterator &)
[SparseMatrixIterator = dealii::SparseMatrixIterators::Iterator<double,
false>, LocalType = double]*
*The violated condition was: *
* matrix_values->column() == column*
*The name and call sequence of the exception was:*
* typename SparseMatrix<typename
SparseMatrixIterator::MatrixType::value_type>::ExcInvalidIndex(row, column)*
*Additional Information: *
*You are trying to access the matrix entry with index <3,13>, but this
entry does not exist in the sparsity pattern of this matrix.*
By the way, i found that the code is working well when I refine my mesh
globally, saying 100% of refinement.
GridRefinement::refine_and_coarsen_fixed_number (triangulation,
estimated_error_per_cell,
1.0, 0.0);
it goes 5-refinement cycle perfectly.
*Cycle 0:*
* Number of active cells: 4*
* Number of degrees of freedom: 25*
*dof_hander._n_dofs() : 25*
* Assemble system finished*
* ||u_k-u_{k-1}|| = 9.91167e-06 Iteration Number: 52*
* L2_error : 0.00233134*
*Cycle 1:*
* Number of active cells: 16*
*dof_hander._n_dofs() : 81*
*Set up system finished*
* Assemble system finished*
* ||u_k-u_{k-1}|| = 9.41577e-06 Iteration Number: 15*
* L2_error : 0.000299119*
*Cycle 2:*
* Number of active cells: 16*
*dof_hander._n_dofs() : 81*
*Set up system finished*
* Assemble system finished*
* ||u_k-u_{k-1}|| = 9.98969e-07 Iteration Number: 2*
* L2_error : 0.000287962*
*Cycle 3:*
* Number of active cells: 16*
*dof_hander._n_dofs() : 81*
*Set up system finished*
* Assemble system finished*
* ||u_k-u_{k-1}|| = 6.38877e-06 Iteration Number: 1*
* L2_error : 0.000287717*
*[100%] Built target run*
However, if only 90% of cell is being refined, I could only go 3 cycle,
and if then same of less than 80 I am receiving same errors...
Might AMR be related to this...?
GridRefinement::refine_and_coarsen_fixed_number (triangulation,
estimated_error_per_cell,
0.8, 0.0);
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